First, as long as you are still married and living in the marital home, all of the marital assets are 1/2 yours, up until the day of separation. That includes ANY bank accounts, checking, savings, retirement.
Second, if you have not done so already, you should consult an attorney. Take all the documentation to the attorney. Do NOT keep contacting these women. They do NOT care about you or your children. They will NOT be the ones living with the consequences of your husband’s decision. They will eventually find out that he is lying to them. If they are knowingly getting involved then it will eventually come back around to them, but your husband is the one that has made the CHOICE to be unfaithful to his marriage, regardless of whether any of this has been physical or not.
Third, you can sue any of them for alienation of affection. But my suggestion to you is this: Make a decision about what YOU want out of this. If your husband is cheating or has cheated, and is not willing to work on the marriage through any means, then you need to decide how long you are willing to let him do this to you. If you do not want to continue to be the only one working to make the marriage work then you should consult an attorney, have him move out, seek alimony or post separation support, primary custody and child support.
It takes two people giving 100% to make a marriage work. I know that people grow apart and “fall out” of love, but to me that is no excuse for infidelity. If you are not being true to your marriage then you have no business being there.
I would also post an anonymous comment on his internet sites if you are able…something like “I wonder what your wife would think about this?” or “Wouldn’t your children be proud to see this?” That’s just me though…