He has to learn that your marriage isn't an open door that he can come and go as he chooses.
"But I have told H that I do not want him having any contact with her and he still goes behind my back."
Again, this is your H's issue.
Go back to keeping the contact on an as-needed basis. Talk to him about the Retrovaille option. If he wants the M, HE is going to have to do something about it.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.