Re the shop, I think he has gradually eroded her confidence and self belief and self esteem to the point where she feels she cannot trust herself or her own judgement – classic emotional abuse. It’s v subtle and clever the way he has done it, by gradually taking over and seeming indispensible at all the shop meetings. And notice how he makes it her fault though that she needs his opinion.
Re the bedwetting, in my opinion it could be a reaction to a change/unsettled feeling at home, picking up on his mum feeling tense etc. That, combined with change in his life – the marriage, new daddy, school etc