I agree, why are you meeting with H and OW? I wouldn't, period. If you have to make sure you have one or more third parties present. This just smells of a set up on the part of H and OW. Think about the things they could accuse you of if it is only them and you.
My thoughts on your husbands sudden increase in income and its effect is this. Have you and he filed financial affidavits yet? If he did and it does not reflect this sudden increase in income then he has lied to the court. Until you are actually divorced and have an agreement in place changes in his income can affect what he will pay. I would turn your lawyer loose on this since it will increase the amount of child support you get as well as spousal support. Given the way he has acted, I would go for it.
Back to meeting with your H and OW. Given the increase in his income, his trying to hide it, etc, again think about what he could accuse you of and how OW will back him up if you meet with them alone. They could leave the meeting and call the police and say you threatened him or even assaulted him or her.
Twisting on Life's Rope Me53 W53 M20 D21 D19 D16 BD 2-2013 D final 1-2015 _________________________ "Dream about tomorrow, Live for today, Learn from yesterday"