Well... since no one answered this yet, I'm gonna take a stab at it.
First, you are a saint! To have helped Mom out all those years with the payments (when you may not have had to), you deserve a holiday named after you.
Second, I have to agree with the previous opinions you got. Look at it this way. Here's a likely scenario.
- They start calling and asking for payment, so you write them a letter telling them not to call you, that you will only accept correspondence through the mail.
- Several months from now, they may or may not try to get a court judgment. If they do try, do you think any court will garnish the $600 social security check of an 82 year young lady?
Talk with your attorney, but I would recommend against having a joint checking account. Just in case they get you in their sights.
Again... talk to your attorney, but I agree.
LG