January 4, 2025

[Mod] RPO Collection M20-21 part 1: Auto Bio Family Tracking + Auto step / in-law family tracking - Sims 4

M20 and 21 have been discontinued because their features now have BG equivalents

Some of their features and settings have joined RPO Core mod.

Let's talk about the GENEALOGY tracking / DNA Testing System again

FULL ORIGINAL INFO POST ON WHAT I'M TALKING ABOUT

I mentioned this in my post of the new year, but in case you missed it, let me sum this up again. This stuff has been Partially done and sitting in my to do list for now a year, which is getting pretty stressful.

 it was in one of its aspects / settings NEARLY releasable already, and has been for all this time. Due to how I've been so far unable to find time to finish it, I worked on making releasable the aspect of it that was already nearly ready as its own thing.

The M04 paternity mod update mentioned in the year-old post linked above has been in the same situation and hopefully will follow with a release soon.

So, What you ARE getting now:

  • automatic marking of family members: auto track and auto label for you up to great great grandparents / children, second cousins, first cousins twice removed / great grand aunts / nieces, and such. ("Choice A: all Sims automatically have their DNA in the database, and therefore, all relatives known = all relatives in existence.")

    • + auto-tracking of 'marital' extended family for sims in committed relationships (not just married)

What You are NOT getting yet:

  • gameplay of having the sins discover their relatives through DNA testing, as opposed to auto labeling. ("Choice B: only Sims who decide to do DNA testing appear on the SimLines app and therefore only them exist in its database for other sims to find out a connection to them.")

    • WHY you aren't getting it yet: that system's core is mostly functional and has been for a year, BUT it does not have reactions, social interactions, etc, which are the parts that matter, so it's not ready to ship out.

  • gameplay around in-laws and step families.

    • WHY you aren't getting it yet: just nto done yet, part of all the planned RPO collection expansions

HOW THE FAMILY TRACKING WORKS:

You don't need to do anything particular, just putting the files in your mods folder and launching the game, the system will do its work. For the genetic family part, it will also retroactively apply on your existing sims automatically.

It's been given good testing, but this can be fairly COMPLEX / CONVOLUTED so if you notice problems or hiccups, please report!

  • distant family tracked by M20 shows in the 'family' filter of the Relationship Panel 

Based on poll results:

  • since responders were near unanimous: added in law ans step family members to relationship panel 'family' tab

  • since responders were very split on this question: added settings to block (or not) romance between step family and / or in law family (in RPO global settings)

When installing this for the first time, it will retroactively read your exiting Sims to draw up their relationships. If you have huge amounts of Sims with lots of relations to each other, when FIRST loading a particular household after installing, the retroactive assigns can make that load screen longer.

DOWNLOAD:

- remove previous version

- grab the RPO Core Library if you don't have it;

- grab the file from this post and put it directly into your mods folder or one subfolder (it's a .package file, so, not extracting!)

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NEED HELP? Check info & links in this post. If they don't answer your question, contact me on Discord, here in comments or messages.

Find Index of All Mods here.

M20 and 21 have been discontinued because their features now have BG equivalents

Comments (58)

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Maylee Oogle · August 25, 2026

why discontinue this? it makes no sense. The game may have updated their tree, but it doesn't allow you to add preexisting sims to the tree

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LAURA WILLIANI ARAUJO FERNANDES · June 27, 2026

onde está o link?

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Lumpinou · June 27, 2026

Hi, M20 and 21 have been discontinued because their features now have BG equivalents

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Miraal A. · May 25, 2026

Hi! I just saw that the download links are broken, does this mean the mod no longer exists? Thank you!!

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Lumpinou · May 25, 2026

M20 and 21 have been discontinued because their features now have BG equivalents

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Gaia The Nature Witch · May 19, 2026

Download doesn't work :(

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Lumpinou · May 24, 2026

M20 and 21 have been discontinued because their features now have BG equivalents

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nikki · April 25, 2026

hey! i know that you discontinued this, but will you possibly implant something like being able to befriend distant relatives / adding them to your relationship pannel to RPO in the future? that feature was pretty neat!

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Lumpinou · April 25, 2026

Hi, the interaction to see them and click them which added them to the rel panel is still there, it's in rpo core, and shows under 'actions'. It's also part of the 'view / invite Sims by Category' mod. Hope this helps!

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Titi · March 15, 2026

How can I allow in law relationships with the RPO mod? I couldn't find this in the settings.

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Lumpinou · March 15, 2026

Heya, the setting was removed when M20 and M21 were removed, but it has returned for the next version which is currently in testing, this time adapted to apply to EA stuff (since in-laws are now BG).

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TAVARES A STEVENSON · March 9, 2026

Hello, when I click the links to try to download this mod I get a message saying This shared file or folder link has been removed.

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Lumpinou · March 9, 2026

Hi, m20 and 21 are discontinued since similar features are now base game

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A · February 4, 2026

apologies for commenting on your posts so much!! 🙏 I just have a lot of questions lol. since the new Sims base game update includes in laws & family tracking (I'm not sure how far that extends - I'd have to check their site), will you be fixing this mod too, or will you be leaving this one? sorry again for all the questions!!

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Lumpinou · February 4, 2026

Hi, this will be discussed at a later update post when more things are done

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Joanna Gawrońska · January 3, 2026

Can a teenager get pregnant in this fad?

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Lumpinou · January 7, 2026

Hi, RPO m5 makes it possible for teens to get pregnant. There's also I'm sure mods by other modders that can do that

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Jessica Richardson · September 1, 2025

Is there a way to cheat to add a relation? Some of my twins are coming up as step siblings as well

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Lumpinou · September 1, 2025

Hi, nobody has reported this before, and now you and another person at once. This is odd and makes me wonder if some other mod has changed to cause this via interference, or if some other broken mod is causing issues. I would need to know more about your exact set up (what other mods you use etc) so we can rule out such interferences. If you are willing to help investigate your situation, come to the Discord server and we can look into all that in depth

a
asdfghjk · August 31, 2025

I've been having issues with twins and triplets getting the step sibling trait

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Lumpinou · September 1, 2025

Hi, nobody has reported this before, and now you and another person at once. This is odd and makes me wonder if some other mod has changed to cause this via interference, or if some other broken mod is causing issues. I would need to know more about your exact set up (what other mods you use etc) so we can rule out such interferences. If you are willing to help investigate your situation, come to the Discord server and we can look into all that in depth

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suzysim · April 25, 2025

My family tree is messed up for one of my sims. Her brother is listed as her Grandmother's brother and a Great Aunt as her sister. Her Mother isn't even listed in family tree. Her Great-grandfather is also listed as her father ( instead of mother) along with her actual father. So now all relationships are wrong, cousins listed as nieces and nephews. I tried to fix with Mccc but correct option are not available. I tried to reset with no luck. This was a same sex female couple who I used a brother as a surrogate. It was always somewhat correct in family tree, but after installing this update it's wrong. everyone else tree seems to be ok, just not this particular sim. Is there a cheat to fix? also could Adeepindigo's "family Connections" be interfering?

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Lumpinou · April 25, 2025

Hi, this mod doesn't modify the family tree, but it does read from it, so if the game bugged out on the tree, it will impact what the mod says. If you can fix up your tree you can then re run the m20 calculations by using 'force recalculate' on the phone menu

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Simbelline · February 9, 2025

Hi. Is it possible to have the relationships show when you hover over a sim in the relationship panel instead of only in the Sim Profile?

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Lumpinou · September 1, 2025

Hi, no, used to be all relationships showed when hovering there, but then EA changed that and now it's only spouse status, almost, that can show there. It's not really changeable as far as I know, part of the sides of the game that aren't editable

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angelzluv10 · February 4, 2025

Do you know when gameplay around in-laws will be avail?

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Lumpinou · February 5, 2025

Hi, no, sometime this year is when I hope to start

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Lela S · February 4, 2025

When are you looking at releasing the step families part?

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Lumpinou · February 4, 2025

Hi, auto tracking of step family and in laws came out the same time as the bio family tracking

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Susie Q. · January 30, 2025

Hello! I don't know if this is just me, but I can't get the bio family tracking to work for my alien child. One of my male sims was abducted and had an alien baby who has now grown up into a child, but according to his family's SimLines app, he doesn't exist, and he himself can't view any living relatives even after I clicked "Force recalculate". In the family tree he's present as the son of Declan (my sim) and the pollination technician, so I'm not sure why the app acts like he isn't part of the family/doesn't have any family.

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Lumpinou · January 31, 2025

Hi, alien pregnancies are treated differently from the test, so that is very likely the cause. I'll check to address it

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Tereza Slavíčková · January 26, 2025

Hi, this is amazing, thank you! One question - would you consider changing the settings on children being conceived by insemination? I have a wlw couple who had children via insemination but for one of the mothers (the on who didn't give birth) the children show up as step-children. Via MCCC I was able to delete the donor from the family tree so he no longer show up as their father, but there is no option to link the children the the other mother as her own (I was waiting at least for an option to adopt them to pop up but it hasn't happened and tweaking via MCCC did not help).

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Lumpinou · January 26, 2025

Hi, first we must establish the difference between family tree and relationship statuses / sim profiles. The family tree is the biological aspect, and following reality the donor exists because it is necessary for an egg to be fertilized - while the sim profiles / relationship status are actual life relations and don't care about dna. The mod is told to give the committed partner of a sim doing insemination parental statuses towards the resulting child at birth, because they are parent in terms of actual relationships, regardless of wether they participated biologically or not. Similarly, the donor has such statuses removed, because while they participated the DNA they are not of a relationship of parent. In the sim profiles, the relationship statuses should be correct due to that, but - Now, the game's systems are not really friendly to using such status at certain times. If it skipped it you can manually re add it with Sim Info Manager, adding son/daughter and mother/father respectively

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ThatLauGirl · January 24, 2025

This amazing! It would be so fun if there was an option to generate a family lineage for new gameplay

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jala · January 22, 2025

hi, just wanted to report that this update did fix the child support loop for me! thanks for all your hard work as always :-)

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Estelle💫🤍 · January 20, 2025

you're amazing, can't wait to try it out! Thanks so much <3

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My Goddess8 · January 19, 2025

thank you for your work. will this conflict with adeepindigo's friendandfamilyconnection?

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Lumpinou · January 19, 2025

Hi, from my end things should not conflict with anyone, not really able to

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Àmy Greig · January 19, 2025

thank you so much for all your hard work! <3

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SimplyDeeSims · January 12, 2025

This is literally a must have mod! It's realistic and adds a lot to the game so it's not a hollow game. SO worth the early access! :) ♥ Perfect to pair with Pandasama's Childbirth Mod! :)

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Manon B · January 10, 2025

Thank you for this awesome update! Do you know if there's a possibility of it conflicting with Sacrificial's Life Manager mod, as it touches on the family tree and genetics too ? Have a nice weekend :)

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Lumpinou · January 10, 2025

Hi, my end of things should not conflict with anything no

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🍀 JenJenLn 🍀 · January 8, 2025

Thank you so very much for this :D

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Galaxy012 · January 6, 2025

Thank you!

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OrdinarySims · January 5, 2025

OMG I love you!

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gfvsims · January 5, 2025

This will be game-changing! Thank you. <3

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Faithie777 · January 5, 2025

You are a pure genius. I bet you can design your own games too. Happy New Year!

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Lumpinou · January 5, 2025

Thanks! The Sims 4 is a very complex game and I couldn't do what the team does, but I am happy to try and do what I do!

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Emily Evenson · January 5, 2025

omg you're amazing <333333

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Munchwithb · January 5, 2025

Incredible! Happy New Year

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schlasonne · January 5, 2025

Thank you ❤️

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Liyah · January 5, 2025

Amazing update, thank you!

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Trishax0ox · January 4, 2025

Thank you so much for all of your hard work! Your mods are exceptional and make the game so much more interesting to play. You are so appreciated!

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Adalia · January 4, 2025

You're amazing ! Thank you and Happy New Year !

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Cathy T · January 4, 2025

Happy New Year

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Jaya · January 4, 2025

thank you so much, for the hard work! happy new year!!

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Ashley · January 4, 2025

Wow! I absolutely love this. Quick question, would this conflict with the Set Family Relationships mod by simsmodelsimmer? I'm unsure if that should even be a concern but I thought I'd ask!

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Lumpinou · January 4, 2025

Hi, no there's no reason why it would conflict with anything like that