You don't have the right to tell your mother how to live her life.
You DO have the right to tell how you're going to live YOUR OWN. You also have the right to let her know you don't approve of her letting herself be a doormat for a man.
You're absolutely doing the right thing.
Don't live for pleasure, make life your treasure...
\m/ Ronnie James Dio, 1942-2010 \m/