Reading anything even remotely like this always makes my eyes wet.
But this.....there are no words strong enough.
I wish I could do something to help. I wish I could offer more than just written words.
But.....Whatever the circumstances, DO NOT GIVE UP. I hope your mother will see the truth as it is, but should the worst to come, have a backup plan ready. Look for people you can trust, so that you have someone you can talk to if it goes all wrong. Make sure you do that before you give her the letter, or better yet, tell all of it to her, face to face. That would take unbelievable amounts of courage, and it is all right if you can't do it. Me, I am still very, very much unable to discuss the whole thing with my own mother, and she seems to accept it just fine. So who am I to talk about courage....
Just.....make sure you are safe. Prepare for the worst, so the pain will hurt as little as possible. It may not be the greatest advice to give, but having a plan ready can save one's life. Gather your strength. You will need it.
There is a better tomorrow.
-Freya