I think you should leave her husband to handle that for the moment.
Is OW H talking to you at all?
If you two can work TOGETHER you will make a LOT more progress fighting this affair... If you two work as a team and keep honest, open, communication running back and forth that the OTHER TWO don't know about...
I have seen that work really well.
For example you can give OW H YOUR H's name, cell #, work address etc and let OW H confront YOUR husband... Hold his feet to the fire etc
