I'm a NP to MN. Previous lurker. I need some advice. Me and my DP have been together six years. We have three children between us, one together. He's a good dad to them all. We met under unusual conditions, it's along story but to sum it up we had an affair, left our partners and stayed together since. Our relationship history is complicated but since committing to each other we've had a faithful, wonderfully honest relationship. Now the hard part. We are both part-time actors and end up at a lot of (fairly wild sometimes) parties, at one these parties a year ago I caught him in bed with another actress, (fully clothed but kissing,grabbing each other) I interrupted them, I don't on know what would have happened if I hadn't. The OW is also married to another actor on the circuit. We had a massive fight, they begged my forgiveness (eventually) and I put it down to drink, drugs and the fact that I'd laughed at them having a kiss in front of me earlier in the evening (like I said, wild party). We moved on, we've all worked together since, it's not been awkward..I honestly was ok about it,laughed it off. A year later, another party and they disappear,her husband tells me he thinks they will be "Together" so why don't we get "together" too? I'm not up for it, I love my partner. Lovely as this man is. Later my DP, the OW and the OWH ask me to go to bed with them all.I say no, the OW takes my hand and tells the men to leave us alone. We laugh it off. Later that night my OH joins us, they both fall asleep. I got to find her husband and see if he's ok being left on his own. I fall asleep in an upstairs bedroom alone leaving the OW and my DP alone downstairs. 2 hours later my DP wakes me up and drags me put the house, I don't even get to grab a coat, he's angry,sulky and won't tell me why.... He swears nothing happened between them he just wants to go. Am I an idiot to believe him? He's admitted since that they kissed again earlier in the evening but says that's all... Is it my fault because I let it go the once? I don't feel I can trust him... What do I do? We keep talking about it but he says he's learnt his lesson and only wants me, but I'm sad inside. We've got another show together and he's different with me to the other cast members...colder. Is that normal?