Animation rough: Easing In

Who're the characters? Nera, Atti, Amy Rose, Supergirl? Who knows!

Ok so I've got some more animation work to share later this week, but over the weekend I wanted to do this for some practice. One thing I think is underrepresented in adult animations is teasing, foreplay and slowly putting it in/pulling out, so I'd like to remedy that. Not sure if I'll actually finish and use this for anything, but just wanted to do it and get the idea out there.