Not at all baby related...

My SO has been acting really weird lately. He only has sex with me when we have a threesome or if I basically force him. Hes also been watching porn A LOT and hiding the screen of his phone so when he is on it I cant see it. If I go to bed after him, he doesnt plug his phone in, he takes it to bed with him. We also had a huge fight 4 days ago because I found a video that showed him cheating on me a little over a year ago. We talked and agreed to work on things but nothing has changed. I feel like he is still cheating on me. What were some signs that your SO was cheating on you that turned out to be true? I want to compare with his behavior.