No Andrew - her OM is engaged. To a woman with kids after he broke up with her because she had kids.
Wait...now I'm confused. I thought it was TDH's XW's OM who is engaged to a woman with kids after ditching TDH's XW because she has kids. Lord have mercy I need charts and graphs or something. LOL
For what it is worth, DV, I agree with kml that going to see what you are dealing with isn't a bad idea, if TDH thinks it is copacetic. Might give you better insight on how to handle her moving forward. Since she is the mother of his children, there will likely be some interaction between the two of you, if you and TDH are in it for the long haul.
Me 50, H52 Divorce from XH final 12/17/2014 Marriage #2 12/31/2019 5 adult (step)daughters (3 from XH's first marriage, 2 from current H's previous relationships) 4 grandkids (plus 2 on the way)