Would you prefer something more... blonde?

When you are doing Ben´s sacriface. There should be option where you include all previous offers. Yolanda final transformation happens during this path. Otherwise you will get false ending. However for unlocking that option you need to do all bloodlines at same save. You will do that when on end of one bloodline you do "choose another bloodline" end you choose another path via already unlocked path. Do not use Load. That way you will not have unlocked different bloodlines.

Yolanda.