Be grateful that he is at least communicating with you rather than filing for D. If he wants you to be his personal cum receptacle, then be the best, most apologetic, most willing cum recepticle that ever cheated on their husband.
Yikes.
I agree that since you (Lifeline) are in this place and obviously want to salvage your M, then you should be willing to do whatever it takes to get you there.
But at the cost of your own self-esteem? Your self-worth? I mean c'mon. Where do you draw the line?
I second everything Didi had to say.
Getting over a painful experience is much like crossing monkey bars. You have to let go at some point in order to move forward. ~ Joseph Campbell