The new lady will be ok, because she will have to be ok. You mentioned that she has no children. If she has no partner either, she will have to keep working or she will lose her house!
I have worked in companies like this before, and bullying or no bullying, I had to stay until I got another job. The unemployment benefit isn't really enough to keep a full household going, covering bills & mortgage. This is one instance where you pray for good health. My company didn't pay sick leave, so I would have been in trouble if I was off sick for a few weeks with flu/pneumonia.
The new lady may be a different personality to you, and may just click with the manager. Also your manager may have been jealous of you, as you had a full life outside of work. He may have resented the fact that you didn't 'have' to go to work (even though the money comes in handy with a family). E.g. if you were let go in the morning, you would still be kept busy with your family, whereas a single person would need another job (to have something to get up for) IYKWIM.
Best wishes
B.