I think that some of us are getting onto the wrong person's case here.
While overthinker may have been in the "wrong" for snooping....It STILL doesn't eclipse the fact that her hubby crossed that boundary. He was MORE "in the wrong" in the first place than her IMO, and he needs to be aware that it has hurt her, and that if there are certain boundaries, they need to be adhered to by both parties. He has instilled a lack of trust in Overthinker, now, that wasn't there before. This mistrust, will only serve to foster MORE jealousy unless it is dealt with.
There is a lid for every pot...Sometimes even two or three...