Multiple OW (two is multiple - one of them a stripper who likely emails him to get more cash from him as a scam) means that his chances of staying faithful on his own without counseling are slim. He has a pattern. Stopping that pattern while in crisis to save his marriage is like white-knuckling sobriety. Sooner or later, he might break his "sobriety" from outside sex.
The problem with talking to them face-to-face is that they get all puppy-eyed and we think we are hearing promises and actions and what they didn't really say - and we assume all this lovey crap they said when they did not promise how to rebuild trust through transparency.
He needs to put it in writing, you need a post-nup and why did he tell his family this time? Was it because you're from the same hometown and if you showed up without him they would know something was wrong? Would you leaving him affect his status in some way other than marriage?
If I were you, I'd go home, leave him alone in your house, institute the VOA somewhere while you're gone to capture his voice on phone or Skype if he contacts any OW. If he doesn't, you've "caught him being good" and it will build trust. If he calls OW or strippers while you're gone, you'll know sooner rather than later, and sooner does less damage to you financially and emotionally.
Ask him if OW employee will be filing a harassment claim against him if he dumps her or finds out she was seeing him while he was also seeing a stripper?
And get whatever he promises to do IN WRITING (email will do so they can't deny later what they promised) and in specific action and none of that "oh baby please.. I love you" crap that they use to distract from making promises.
I'd also get my ducks in a row financially, because for all you know, he delayed you from leaving so he could do the same thing. Ask for legal advice to make sure he can't jack up the credit cards so that you'd have to pay half if you separate later, in effect giving him half of that loan as "free money" for strippers and girlfriends while you have to pay it off.
Now is the time for you to look at your life and figure out what you'll need if you split. Do it without emotion. Get a separate bank account. Insist on knowing the family finances and expenditures even if you're a SAHM because you deserve to know it. You don't want to find out five years from now that he gives thousands a year to a stripper instead of putting it into retirement or kids' college fund.