[violetpretty]

I wouldn't try to be too pushy by inviting yourself to hang out at either house. If you are good friends with girls in these chapters, you are going to hang out with them anyway, right? When you are hanging out with a friend (be it getting some lunch, dinner, ice cream, bar, movie, shopping) ask her to invite a couple of sisters along too. They'll get to know you in the most authentic way possible, by seeing you be you in situations that you'd be in anyway. Once you've met a few extra sisters from A and B, if they invite you for dinner or TV or whatnot, it'll seem more natural than "Hi I am a PNM".

ETA: Sounds like you'll need recs too.