I agree with Az, if she has OM, then you need to cut her off. Be polite but do not do the things a H will do with her. I know you think you can outdo him and win her back, but not true. Just be a consistent solid person, but make sure she knows that if there is OM involved then you are not.

M 37
W 34

T 12
M 8
D 7
S 4

Need break 4/12/15
W no ring 7/7/15

Separate room 4/12/15
Separate living suggested 8/15
W moved out 11/1/15