You need to kick his butt to the curb. If he did it 2 times, no telling when he's gonna do it again. If he cheated, there's a reason why, I'm assuming not happy in the home, and if you don't know what the problem is, then you can't discuss it with him, so he's open t0 do do it again, and you don't need to wonder what he's doing everytime he's not around you. You don't need that headache.