This could be a long one...
A few months ago I saw on hubby's computer screen a conversation between a couple. It was on a site where you had usernames so it's not obvious who is who. The only line I got a chance to read went along the lines of "I love my wife but I think I'd regret seeing where this could go" before hubby walked in. He claims that it wasn't him and that he ran the server that these two were having this conversation on, which was why he could see it and was having a read of it to be nosey. We had a conversation about it, I asked him about half an hour later to bring up the conversation again so I could read it, if it wasn't him it should be obvious. He disappeared off to bring the conversation up before returning and saying it had been deleted (apparently not by him) and he couldn't retrieve it.
We have a young family and without any concrete evidence I decided to give him the benefit of the doubt and try and move on from it. Fast forward a couple of months and he was in the bath, his back towards the door and I was heading to bathroom myself and I saw a one on one conversation with a girl whose name he's never mentioned before on whatsapp that he was reading. He had headphones on so didn't initially hear my approach. I asked him who she was and he said it was somebody in a group conversation. I said unless the group is called *insert girls name" then it was a one on one conversation. He maintains it was a group conversation but wouldn't show me to prove it. We've now had a massive arguement cos he thinks I should have no reason to doubt him.
Am I being unreasonable to think he's having some kind of affair (at the very least emotional). Or am I overreacting? When we were arguing he literally made me feel like it's all in my head and now I just don't know whether it's me or not. 