I've been around here for yonks and this pops up quite often on MN, usually in the context of their son being the victim of some maliciousness contrived by another woman or women.
The two examples which immediately spring to mind are false rape accusations, or having an awful daughter in law who takes your son away.
I have a DS myself and in all honesty I have never spent a moment fretting about either of those things. I
Just to add, I don't want to be dismissive of people who have experienced this as I'm sure it must be horrible.
My thoughts are , this type of concern is rooted in misogyny, and seeing women as "other" or "the enemy" I'd be interested to see what other people think?