I take care of my mom very well

I take care of my mom very well, mine is fixing her car. My brothers do help out as well. One does the repairs to her home. She came in today and said the brakes in her car were starting to grind including an oil change done. Got it done and I do not charge her. Reason is she has taken care of my brothers and I until the age of 18 and this is my way of giving back. She is 72 years old gets around well for her age. I admit it was tough for her to raise my brothers and I when I was 17 years old at first, dad passed hit by a drunk driver 30 years ago. She got through that and I was working at the same auto repair shop my dad worked at 2 years into an apprenticeship.