TL;DR My long term partner has expressed some interest in being a cuckquean, advice on how to proceed.

My long term partner [F31] and I [M31] have a pretty good sex life. Generally, we are not very kinky. We have fooled around in public (bar bathroom) and outdoors in semi-public areas but aside from that we keep it pretty vanilla.

However...recently I've become more confident that she wants to watch me fuck another woman. Let me elaborate: Early on in our relationship she told me that she'd had threesomes in the past. Not a big deal, actually pretty hot. Not long after she let it slip during a game of Never Have I Ever that she finds it a huge turn on to watch her partner fuck another woman. Okay, pretty hot but it was still early in our relationship so I didn't pursue too hard. A while later (while fairly drunk) She said outright that "if [Friends Name] comes to visit this summer we should have a threesome with her". Alright, that's more direct.

That was summer 2020, and between then and now not much has been said on that front. I did mention the same night that we should explore it further but nothing came of it at the time. We do occasionally watch porn (sober) and it's always FMF threesome porn, but it's basically been 2 years since it's come up...until this past weekend.

We went camping and got pretty drunk and high, and long story short...during sex she wanted to hear all about how I used to fuck other girls, suggested a threesome with her friend who is coming to visit later this year, and as I was getting close to the finish line, told me to close my eyes and imagine that she was a one night stand I had a couple years ago. Today she made a comment during some light sexting about how it "sounded like those other girls fucked you pretty good 😉"

It sure seems like something she's really interested in, and I am too, but I'm not sure how to proceed from here (especially given that we haven't been sober most of the times we've talked about it).

Any advice would be appreciated!!