So, you've had a serious conversation w/your h about everything. You've apologized...now what to do? Pick yourself up, dust yourself off and continue moving forward and stay the course. Any changes that you have made and continue to make are to be permanent and for you, not to try to keep him.
Right now, emotions are running high for all and, of course, he feels like a caged animal w/no where to run and hide. Now, he knows that you were snooping and will do everything in his power to keep things from you.
In the future, keep your conversations on point and short. Their attention span is that of a gnat. They will hone in on certain words and that is all they will "hear". Do not continue to apologize for what you've already apologized for. Just move along and continue to be the best person that you can be under the circumstances of living under one roof in trying times.
Stay the course, dig deeper for patience and no more conversations about the ow or the relationship. The more you question him about his actions/behaviors centering around her, the more likely you will be pushing him towards her. You don't want that.
Please be careful when asking about other sites or people in the same field as Michele. One of the rules is that we do not reference other sites, people in the same field, links, etc. Many people who come here don't bother to read the policies of the Board, so we have to remind people why certain items are edited and/or deleted from their postings...and there is no need to apologize...we have all done this too.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.