Will it be up to me??

I love my mom with all of my heart, but I had a thought today that frankly terrified me. I will be 21 at the end of this month. I will have been married a year on the 12th. My mother is 42, but her health isn't great. She smokes, has used drugs in the past, and has other issues. I am worried she may die younger (I pray not). She is in massive debt. The area we live in is only a few hundred and everyone knows everything about everyone, literally. With her drug and criminal past no one will hire her. She has been out of a job 3-4 maybe 5 years. She barley gets by with the assistance she receives. My sister even had to live with me for a while instead of my mom because my mom lived in a tent for a while and I paid for the camp ground, got her food and stuff. She refused to stay with me because she felt she was a burden and intruding. I told her she wasn't, but she says we are newly weds and should be alone without interruptance. I am terrified though, if something happens to her I will most likely be the one having to pay for everything. Medical bills, funeral, the whole thing. I will do it though. I already know she will depend on me to pay for retirement home and whatever she needs when she absolutely can't work. My question is though, if something happens to her, will her debt and stuff fall onto me to pay off??