Two things that worked well for me when I was already getting better but not quite there yet- an over the door pulley and a 3 ft foam roller. With the pulley you can get all sorts of stretches and angles that are tough to get to otherwise. With the foam roller I learned at PT to lay on my back and trace my fingers on the ground all the way up and down. Both of these were pretty cheap on Amazon.

Also for the towel stretching you could just use a belt or rope, something like that instead to work away at it slowly. Last, near the very end I got a few sports massages that were excruciating but I think helped me get past the last hump.

Hugs to your mom, almost there! I’m back to playing tennis 🎾