I would be VERY careful with what your H has proposed. It seems that he is definitely not out of the fog. He is still living with OW and is wanting to know that you will take him back in a couple of months when their lease has expired??? He is still very much in the midst of his MLC (or whatever it is you want to call it). When we were S, my H suggested returning because of financial reasons. At that point, he was still seeing OW and I did not accept his offer. Piecing is very difficult. The reason your H has given you for wanting to return does not make it sound that he has really reflected on the things he did and has worked through his issues. You only want him back if he has had time to work through some of his issues (without OW in the picture) otherwise you'll find yourself back here in the same situation in no time.
Me47 H46 S13 M16 Piecing since May/09
"Life is 10% what happens to us and 90% how we react to it." Lou Holtz