We're supposed to be divorce busters here, not trying to talk people out of their marriages.
True, if the relationships are good ones gone astray and are worthwhile to attempt to salvage. It doesn't seem to me to be the case here.
Things went bad once the relationship had settled; H creates distance by not being involved; taking sex away; the more he's spoken to about it by his partner, the more he distances, such as he avoids going to sleep with her; he doesn't openly discuss his activities (more distance); now there's evidence of his being with others (more distance).
Do you see where this is headed? There will be a confrontation sooner or later, and that's going to make things uglier.
