I have filed for divorce from my husband, as I also found out he is having an affair. Well, I won't be a step mom to his daughters anymore, so time for me to leave ladies. Good luck and hope this group helps one anther. Just remember, when you married your spouse, you knew about the kids. I can only hope that you have that good relationship with your step kids, as I once did with mine, till my stbx talked about me, and trashed me and even told his girls about his girlfriend.
So long as I go on long painful journey of a divorce.