I don't know the entire story, but you must realize that sometimes parents do more for their children that the children will ever know. Your Mum won't be around forever, and unless she is actually abusive, and I mean beyond a doubt, no "My parents don't understand me" teen-aged drama, there is very little reason to cease talking with her or to act rudely towards her. You can never get those moments with her - or anyone for that matter - back.
She went to jail when I was four years old.
For gambling her and my dad's money, and then stole from a bank.
And didn't come back until 1-2 years ago.
Now, what do you have to say?