Yeah, now that I think about it, even if it's not anything the authorities will take seriously (and they might!) Dad coming to custody negotiations saying "Lia told me her gay uncle has been hurting her, I have it on tape, I'm going to report it to CPS if you don't concede" is a very real threat, whether Dad started it or not. That might be a good thing to mention to Lia's mom, too, if she's not interested in LW's fears for himself.