I am wondering what, if anything, I should or could do about a situation . . . My husband of 21 years divorced me about 4 years ago (I was told that he didn't want to be married or be a "Dad" . . . he just wanted to do things he enjoyed without feeling guilty . . . ) 
My children were 16 and 19 at the time of the divorce . . . I found out after the fact that my husband had numerous affairs throughout our marriage . . . 
 
My ex-husband and I have come to terms with our divorce and issues . . . we are somewhat friends and have regular contact . . . My ex is living with a woman that he began dating about 6 months after our divorce . . . she has three children (all girls--ages 16, 10 & 8) each from a different father (she has been married three different times) and all of the girls live with her and my ex. 
 
He has now told me that he has found "religion" and intends to marry this woman . . . my children have told me that this woman seems to basically be okay but has problems (drinking, smoking, disciplining her children--the two oldest have snuck out of the house at night and the oldest is sexually active and into drugs) . . . I've also been told that she has been uncooperative in signing a strict prenuptial agreement (my ex and I had a very successful family business) and that has stalled the marriage from actually happening . . .  
 
All of these developments have been extremely difficult to understand (especially since he didn't want to be married and/or have to deal with teenagers) . . . My children are upset by all of this (my ex has moved his girlfriend and her children into a home that was previously our family home . . . he has spent a lot of money remodeling and has even put a fancy inground pool and hot tub in the backyard). 
 
I am really not bitter about all of this because I am very happy and independent living in another city where no one knows about all of this, but I am concerned about my children (they live in the same town as their father--where they have grown up and lived all of their lives) . . . I am also concerned about what my ex is doing to himself . . . 
 
Is there anything at all I can or should say or do? . . . Your varied perspectives would be most appreciated.