I wonder if the mother still has an attachment to late husband, in which it's hard for her to let go and choose someone else as a lover, especially if your kid's father died.
I can understand that.
But it seems she be loosening up with him, just fucking date already.
Remember friends, static stretches like they did (sketchily in a hidden area of a school) should NOT be done before exercise. Dynamic stretches or just warm-ups is not only better but also SAFER.