Well, it's obvious that your mom has a lot of things that are on her mind and stressing her out and this happens to be the latest thing that broke her completely.

What she did is not right, and it's not your fault. Adults need to handle a lot of issues and she's particularly stressed at the moment. Give it some time and maybe she will get her senses again.

In any case this kind of vengeful behaviour is very manipulative and unacceptable.