It's not true, no... your mother is wrong there. I understand how much that must have hurt you I've been SHing for years and my parents reacted in an equal way when they found out years ago.

Fact is, SH has a lot to do with internal pain. I understand that it must hurt your mother to see you hurting so much - it should be her concern to take care of you though.

There are multiple good articles on the internet about why people SH... maybe you could send one of those to your mom?

Take care