Sounds like another lady I know who is up there in age. For some reason, although they want attention, they don't quite know how to thank people. My aunt who was in her late ninetys never, I mean never said thank you. We would drive over one hundred miles to see her, but all she would talk about was her and her problems. We would go to all her Christmas and birthday parties, but no thank you. She would ask us to drive the 100 miles, one way, to take her to the doctor, dentist or eye doctor because she didn't want to pay the $5 cab fair. Top it off she had a fair amount of money, more that a quarter million, but did not leave one cent to our family, which was fine, that was her choice. It bothered me that she gave one of her nieces that never went to see her a lot of grandmas things and we didn't get anything of grandmas. I was luck and able to buy several things of grandma's things at my aunt's auction. She always told us we owed it to her since she babysat for our mother when she went to the hospital.
Sorry about the babbling, but my point is, some people, at least that generation, don't know how to say thank you, but then there are some that can't thank you enough. Believe me, she loves your lovely quilt and probley shows everyone. Go see her sometime and just talk, she will love having you visit, but may not act like it.