i've just caught up with your thread and all I can say in the first instance is that vanilla is right you should make contingency arrangements so that you can just leave if it gets to hostile or your H gets overly aggressive - A bag packed and in your car is a good plan.
Having said that your H is probably hurting right now and so some understanding might go a long way. Your relationship with OM will feel good and certainly better than what you have put up withrecently but you definitely are flipping the WAS/LBS dynamic between you two (includng any justification) - what you do is up to you but please remember how it felt for you at BD 7 months ago.
Both mid 30s, 2 young kids BD 7sep14 XW moved on long ago, now living with OM1 D paperwork in progress