I have no reason to NOT believe her. It's a very common and sad. The windshield incident is wild.
At the same time, I don't see the purpose in telling this story publicly on IG.
I get it to an extent. We all have fantasies about hurting or defaming those that have hurt us. (Again, I believe her.)
Their kids are probably thinking, 'Great, my very public parents are making accusations over social media again.'
There is no way a responsible therapist would tell her that the best way to handle this, for her family, is to make a vague IG post. I don't know who it serves.