["I enjoy going to my Grandmother's house and helping out with chores and cleaning. If feels so good to help her out and make her comfortable.", 'What a nice person you are! I bet she appreciates you', 'I hope so.  I feel a strong sense of obligation to her since she was always there for me growing up.  Do it is the least I could do for her.']
You have a good set of morals. That's becoming more uncommon lately. So, good on you!
I enjoy going to my Grandmother's house and helping out with chores and cleaning.  If feels so good to help her out and make her comfortable.