My gf (26F) and I (25M)have been dating for about a year now and about a month into the relationship she asked me if I would ever have a threesome. I responded with "not with someone I'm in a serious relationship with". A few months later we meet up for drinks with her female friend, lets call her Sarah. Nothing happens over drinks but afterwards my gf tells me that she and Sarah used to hookup in the past and even showed me their videos that are still on her phone… About a month after this night of drinks my gf asks me again if I would have a threesome with her and Sarah. My primal male brain says yes because 2 hot girls is better than 1, right? But I know that it would cause problems one way or another and no one is getting out unscathed.
My question to everyone here is, is this grounds for breaking up? I feel really weird that my gf has brought this up multiple times now and the fact she still has those videos seems completely inappropriate. – Apart from this the relationship has been amazing and very healthy.