Bit of a long one so enjoy.
I got introduced to my girlfriend about three years ago by this couple that I work with. So from the beginning of our relationship we have been very close with this couple doing the double date thing. We always go out together, hang out at each others place for movie night or poker and we see them at least twice a week.
Our conversations never really have to do with sex, and even though I know the guy is fond of my girlfriend (as he talked about her in a sexual manner years before he formally introduced me to her), it’s not a scenario where the four of us are ever going to swing or whatever. It’s been a very vanilla friendship up till now.
My girlfriend and I are very kinky and our relationship has only gotten kinkier in recent months as we’ve been browsing nsfw subreddits together and exploring kinks. We talked about wanting someone to watch us have sex for a while and when trying to think of people in our life that would fit the bill, these are the only people we thought it made sense to try with.