My understanding is that her H is asking for a divorce...she referred to him as a WAH.
Regardless of who did what in the past and why, if he's pushing for a divorce but also wanting to have sex, it would seem to me that warrants a time-out and some communication/discussion time between the two of them so that they are on the same page.
If he's not pushing for a divorce but just bringing up the possibility from time to time, I guess that could be a different matter, but it still seems to me like there's some communication that needs to take place here.