You need to detach and not worry about what H is doing, when where and with whom.
You ML Sunday?? so you are nonverbally letting him know its ok to have OW on the side and you on the other? Stop doing that ... like yesterday.
As far as how long the A can last ... do not put timelines on such things, nothing you can really do but keep your side of the street clean.
I would suggest you GAL, just as your H is obviously doing while you are keeping the home locked down ... start pulling back and letting your H really FEEL what life will be like without you.
