Daughters birth mother

I adopted a child from a teenage girl 14 years ago. My daughter knows she's adopted and we have a very close relationship. About 3 months ago I got a friend request from her birth mother. I ignored it, but then she sent me a message request. It was a pretty long message, but to sum it up she told me every day since she gave her up for adoption she had regretted that and she would really like it if she could see her

She wanted to see the beautiful lady she had turned out to be. We talked a little and I told my daughter about the messges. I gave her a choice and she said she didn't want to meet her. I let the lady know and she has not been taking it well. She's been blowing up my inbox about how much she regrets her adoption and just wants to talk to her. How badly she wanted to be her mother again. I told her my daughter had made her decision and that she needs to stop contacting me about this and that I'm sorry. Well I wake up to 22 messages. First it's the same thing about regretting the adoption, then she started getting aggressive towards me about how I tricked her and stole her baby how I probably abuse my daughter. I blocked her. I started getting friend requests from different Facebooks of her and message request and blocking them all. This went on for a couple months until I finally said fuck it and deactivated my Facebook. I feel bad for this women and hope she gets help, but I have a daughter and myself to protect and worry about. Not her.