Need help talking to my sister about this
I (21FtM) have been in a physical relationship with my mom (45f) for 2 years. We have been trying to form a triadic relationship with someone else since both of us want a polyamorous relationship. The only problem is that no one really wants to be with us due to societal "issues" with incestuous relationships.
We've genuinely tried with my mom talking to 3 different male dates about it and with me talking to 2 female dates about it but they all said no (with one of them saying they'd report me). So me and my mom decided to talk about it and she asksd me if I was attracted to my younger sister (19f), I thought about it for a while and realised I wasn't necessarily attracted to her but also wouldn't mind her either since I've known her all my life and was a bit curious about how she'd be in a romantic and physical relationship. She's currently at college and is exploring herself in different ways (I believe she's either bi or pan) so we decided it might be best to let her know now since she's open minded.
I feel like she might be alright with it since she knows of my relationship with our mom and is fine with incest in general but I'm still not sure how to bring it up to her. Some help would be really appreciated, thank you!
Edit: my mom had a call with my sister and started to lean into how she's exploring herself and she's said that she's done it with a guy and 2 different girls on separate occasions (I was right about her being bi). My mom then brought up the fact that her and I were looking for someone else to be in a relationship with and that we need someone we know very well since our dates aren't working out and my sister said that she could help. I'm not sure if she meant she'd get someone for us or whether she'd be down for it but we didn't want to push any further so my mom cut the call. We plan on having me call her tomorrow this time to see if she's down herself and hopefully she is 🤞
I'm so excited lol