Let my best friend fuck my gf [MFM]

I finally let my girl get fucked by my bestfriend (MFM)

We had talked about it for awhile, but this weekend we finally got drunk enough and everything worked out.

Background: my gf and I had talked about having a mfm threesome for some time with my bestfriend but it had just never come to fruition. Eventually we stopped talking so much about it but every once awhile during sex I would bring it up and she would show slight interest.

Started off not intentional, we had all gotten pretty drunk and my gf goes back to the bedroom to change into her bed clothes. She comes out in one of her nightgowns with no bra and wearing one of her “sexy time” thongs. Not like full on lingerie but you can definitely tell she wanted to show herself off. This is when the idea first came into my head. My buddy and I had been playing call of duty and so she was seated on the couch behind us. After one of the rounds I remember looking back and talking to her and seeing her (what seemed to be intentionally) flashing her panties with her legs open. Pretty sure my friend saw this as well. We play a few more rounds and she eventually lays down on the couch and begins acting like she is going to fall asleep. I realize I have to make the move now and so I ask if she wants to go back to the bedroom. She says yes and gets up from the couch, as she does her nightgown comes up showing about half of her ass as she walks back to the bedroom.