I'm at a complete loss here on how to deal with pre teen behaviour vs dad. Son is 12 and a half, not physically mature but has started to have a bit of an attitude sometimes. Sometimes rolls his eyes or gives a loud sigh if he doesn't get what he wants - usually more screen time or asking to use our phones briefly (he doesn't have one yet). His screen time is quite limited. Mostly he is pretty good, does his homework etc, and doesn't complain.. I see these behaviours as him just expressing frustration briefly. However his dad completely takes the opposite view, if he hears so much as a sigh or sees a small eye roll, he takes it completely personally against himself. He tells him off about it and says our son is hurting his feelings and turns it into A BIG DEAL. If I say anything, like 'just leave it' and our son didn't mean anything by it, he turns on me and says I need to discipline him and he shouldn't be allowed to get away with it. I just thought it was fairly normal pre-teen behaviour and it doesn't really bother me as I think he will grow out of it. I think his dad is being really hard on our son and I'm afraid he's going to grow to hate his dad. I think I would have if I'd been treated that way. It's really getting to me now as his dad always turns it into a fight between me and him about 'discipline' and it's about the most mundane stuff that I would turn a blind eye to. I think the fighting between me and his dad upsets our son even more. What does everyone else do about this sort of behaviour?