I convinced my boyfriend to fuck his sister

so my family and I have been pretty much free use or whatever for a while now. It’s honestly the best thing ever like I love being this close to my family and if it wasn’t so taboo or ppl weren’t so quick to judge I’d recommend it to literally everyone. It’s brought my family closer and you really get to feel the love from everyone. I’ve already talked about it a little here but this confession is more about my boyfriend. My boyfriend didn’t have the same experiences I did and was so shocked when he found out what I do with my family. It took me a while to tell him and I kinda eased him into it. We had a threesome with my sister first and then with my mom and then my dad joined in too lmao but that’s a different story. After he joined my family I asked him if he would ever do anything with his. He told me he always had a crush on his sister and I couldn’t blame him. She was in college and blonde with such a nice body and so pretty. He said that she would never agree to something like that bc she was very vanilla. Well his birthday was coming up and I wanted to give him a little surprise. So I started hanging out with his sister and we actually became really good friends, like really good friends lol. We started going out and getting drunk together and that led to us making out and having fun with each other. After a couple times of us doing this I brought up having a threesome with her and another guy. She said she’d love to but she didn’t know any guys she’d be comfortable with. So i suggested my boyfriend which is her brother and ofc at first she laughed it off and told me no but I told her that we could obviously trust him and feel comfortable with him bc I mean he’s my boyfriend and her brother lol and I said it would just be for fun and we didn’t have to think about it too much. It probably helped that we were both pretty drunk lol but she was hearing me out. I told her how big of a cock he had and how good he fucks and I could see her start to seriously think about it. So I kept pushing and went up to her and started rubbing her pussy and fingering it while talking about the idea of her brother fucking us both. She was getting wetter and wetter and I told her I’m gonna text him to come over now and she moaned “okay yes”. Lemme tell you as soon as I texted him it was like he teleported there hahaha he got there so quick. And the rest was literally the hottest night of my life. I could sense the sexual tension between them and they were very shy with each other so I got to lead everything. I started by sucking his dick while she watched then I called her over and told her to try it. She immediately deep throated it while I held her hair back. I asked my boyfriend if it felt good and all he could do was moan a quiet yes. He took turns on our throats for a while and I got to watch as he fucked her for the first time. It was so much fun. And now they fuck regularly just on their own and I don’t mind I’m honestly happy that I was able to bring them closer and I get to Join on their fun a lot. Now my next mission is to get his mom to join us too hehehe