Speak to your two girlfriends and encourage them to invite other women into the bedroom for old-skool menage-a-trois ....trust me two hot women servicing the husbands will incentvise to reconsider the Lifestyle and eventually, admission of cheating.
Seriously speak to your girlfriends but, watch their reaction about getting other women with their husband....lol
i'm pretty sure the last thing they want is their husbands to be sleeping with other people.