
Since the mother is known to be ill I don't think she jumped it could be she fainted/collapsed due to stress, I mean this isn't a first time but it was stated in the story how this happened we even have a chapter about it.
And also why would she jump after thinking about that flash back? She clearly feels like she has to live for her son's sake and she probably still does.
I felt the need to see this since I've been rereading since I started reading in season 2 and caught up to annalisze this shit
Watch them drug the hair products as well, nothing of his is gonna be safe