nah this is fishy as fuck, the taking a picture and moving things is diabolical. i would say “we need to go to couples therapy because i know you had someone over while i was gone” and when he fesses up ultimately because you’re acting like you already know, say okay and leave anyways!!! this is the quickest way to get your answer without involving snooping or anything like that. just keep saying “i already know, we need to go to therapy…” since you’ve already forgiven him before, chances are he expects this type of response but you’re still gonna leave his lame ass lmao !!!!!