How do I deal with a check that I wrote a friend to cover debts over a long period of time. The debt is paid but she still as ck

Over a period of probably 6 years a friend who is like a mother has helped me financially. To make good on the debt in the event of my death I wrote her a check for $25000. Dont remember if it was dated or not. Anyway, the debt is paid but I think she still has the check. I also think I have closed that particular account. Turns out I have put myself in a bind. BLOOD is thicker than water. She is close to 80 and I am 45. We have a credit line at the bank and I thought it was for my use. She has taken thousands off it and used it to give to her grandson but she thinks I still owe the entire debt. I plan on moving, which she demands I stay where I'm at! She is just bossy, wants me here to drive her around. How can I other than ask for the check back, deal with the situation? - Is this your question? Add additional information