Hi any help/opinions would be appreciated please. I've been married for 10 years with 1 dc and always known my dh fantasised about us swinging. I've never been into this however ive encouraged his fantasies verbally during sex as otherwise he would struggle to come. This does blur boundaries I suppose although I've never given him cause to doubt my loyalty although he has had at least one affair in the past.
Anyway tonight we went out with a couple who are our friends and have been for many years. I've heard rumours in the past that this couple have a bit of an open marriage but I've never really believed it as I had no reason to do so. Anyway I don't know what changed tonight but the wife really came onto me. I was horrified but made it clear I wasn't interested. However while she was propositioning me (for want of a better phrase) my dh came in and made it clear he was interested in having sex with her while she was having sex with me. I was horrified and said 'sorry to disappoint you both but I'm not interested' (or something along those lines) and then ran off to my room. He said 'leave it xxxx, she doesn't want it', then got rid of them and came up to me.
Given his past history of affairs my instinct is to leave him (if I had been on mumsnet in 2005 when he had his last ea we wouldn't have been together now) however his defence (!) (and he is very gutted) is that he thought I was into it too (although I think my body language was absolutely the opposite)
I'm gutted. The only thing stopping me kicking his sorry arse out right now is wondering if the blurring of the boundaries mentioned above has confused things and made him think I am into something I am definitely not. I would be grateful for any opinions as two hours ago I thought I was very happily married. Thank you