Do we know his wife didn't have a zero tolerance policy? He'd been caught once. Do we know he didn't swear he'd never cheat again, beg her to take him back? Do we know she didn't threaten to divorce him and take their son away if it ever happened again? Do we know if she'd been suspicious shortly before Cooper died?
Tex, when I say ZERO tolerance, I mean just that. As in, caught and you're gone. IMO it's just too big a betrayal of trust, one I couldn't forgive.
We haven't heard at trial, but the two were allegedly in counseling, a notion supported, however slightly, by the fix a marriage books on their living room bookshelf.
FWIW, both belonged to a very conservative church-- one with a doctrine of submission- and Leanna is known to be a very religious woman. It's speculation, but no, I don't imagine Leanna as a wife who gave ultimatums, I imagine her as a wife who felt responsible, even when a more appropriate response, imo, would have been to throw his arse out .
And yes, we know Leanna has never wavered in believing it was an accident, at least not publicly.