you can have all the evidence you could ask for, with same sex, it's not as clear cut as a hetero affair. Staying out till 4am with a same sex friend... could just be a friend thing, but maybe it's more. Mine told me flat out she was gay, but has denied cheating. I've got an overwhelming amount of circumstantial evidence that would point exactly to that, but I never had a true silver bullet.. Even with PI collected evidence, she could try to claim nothing happened, franklly I've second guessed everything for the last year and a half. I know she's lying. I know she'd been texting a 21 year old 1700 times in 1 week leading up to me and the kids going out of town, I know she went to a sex shop on her way to spend the night at a rental house with said girl... the PI has them in front of the house on tape, And I have video of her returning home the next morning.... but my mind still plays the second guessing game... good hearts, no matter how suspicious they are of someone, want to believe the best against the worst evidence, and they know that. And they play that.