I sure hope you aren't still living in your mother's home.

I think she is full hot air and I suggest you stop talking to her. Ignore her threats. If she does sue you, you defend. You can subpoena Verizon's records to show who did what. I don't think she would win but that's just my two cents worth.

You probably should have unhooked yourself from her apron strings (phone wise) a long time ago. Plenty of phone services don't require contracts or credit and you can get some pretty inexpensive refurbished phones.