Well, thats a good question, first of all, you and you mom are in my prayers, and second of all, I have the same problem with my mom. She is one of those women who fears being alone, so she always chooses the bum. It has always been really hard for me to talk to my mom about it, but recently I got the courage. I sat her down and pointed out all the negative and positive things about her "friend", even going as far as to make a list. At first mom was made, but she got over it and realized I was right. Guess what no more lowlife. Just sit down and talkt o your mom, tell her how much you love, admire and respect her, and you hate to see her being used. She may get upset (hope not) but in the end she will thank you!! Good Luck I hope it all works out!