So I am in a peculiar situation. I told my LTR that I want to start having threesomes and experimenting with other girls. She's not into the threesome idea because of insecurity and whatnot, but she is cool with giving me a bj with another girl.

Here is the curious part. The girl she wants to do it with is her twin sister (lets call her A) because she is most confortable with her - awesome right, yeah. But this is the thing, my LTR talked to her about it and she is on the fence and is understandably unsure. A lives about 4 hours away and visits us irregularly, so she will come visit within the next month or so. My question is about how to escalate while keeping everything comfortable and fun. I have seen many times RSD Tyler initiate three-way makeouts, but they are sisters and wont kiss each other so his way will not work for me.

Logistically, we will probably all go out drinking, get drunk, and end up back at my place. There are two bedrooms, mine, and the guest bedroom upstairs. How should I keep us together when we get back instead of immediately splitting up to our own rooms? Also how would you escalate in a way that keeps A comfortable (no kissing myself or my LTR)?

I look forward to seeing your responses, especially those who have been in similar situations themselves. If you have been in a similar situation, would you do anything different looking back on it?