Ok first of all sorry for the long post. so I don't know if this is all in my head or if it's a thing...I need honest opinions. I am posting this anonymous because well I'm to embarrassed. So my boyfriend told me he had a thing for brother sister type porn and I didn't think anything of it cause to each their own, but lately he has been talking about his younger sister (22) he's (24) a lot. They just took a road trip to another state to see his mom as his sister and Mom are moving there. Also fine, but I noticed that when ever she is around him she talks in a seductive voice and in a way flirts with him (touching, play fighting, etc). If I'm around it's like i don't even exist to either of them. Whenever I post something about him and I on social media she always has to one up me with videos or pictures of them. I hate that I feel so weird about this. I almost feel as tho he enjoys her flirtatious ways with him....he's always watching brother sister porn...I don't know if it's something he really wants to do or if it's just like some emotional way brothers and sister act (I've never had an older brother). When she is not around he treats me pretty good. His sister has also been really weird (like lovey to me-when im around and I don't feel comfortable) it's almost like a front or something. He also will not text me back when she's with him. He says she's basically like a male version of him (which is slightly true due to same Mom and dad), but I feel like it's a different kind of same person different gender. I've seen flirtatious snaps of her talking and play fighting with her on her snap stories...am I over reacting? Am I weird to feel like something is going on? Has this ever happened to any of you?