I’ve been with DP for almost 17 years now. I caught him in a hotel with another women 2 years into the relationship, I was young and we got back together 6 months later. I’ve had absolutely no reason to suspect him since. We have 2 kids together and I thought we’ve been happy. He’s a very sexual guy and is horny every night. Has been since I’ve been with him, before kids our sex life was explosive. Since kids I’ve had a low sex drive mostly down to getting older and a life long medical condition. We have sex mayb once/twice a month so I wouldn’t be surprised if he has found someone else. (;not that it’s right) 2 out of the last 3 times we’ve been or tried to be intimate he’s had a soft erection and it wouldn’t get hard. When usually I just lay next to him and he gets a rock hard one, Now he had initiated both times so it’s not like i had forced him. He’s also been different in bed, like asking for different things. Just different in general. He’s more attentive than usual and gets defensive over innocent questions. He has been a negative guy most of the time I’ve known him so that could just be that. For the most his personality hasn’t changed and he’s not been short or such with me so this is what makes me confused. Anyone that’s been cheated on she’d a bit of light on behavioural changes in thier partners?