Do you think it is mean of me for thinking this?

I went to two stores this afternoon, the last one was a Walmart to get some yogurt, came out and drove off and saw my sister walking towards Walmart...kept going but I wanted to roll the window down and yell “Hot enough for you??” As I drove off. But I didn’t... I gave her rides for a year and a half, anywhere she wanted to go in this city. I gave her things and did other stuff for her. She ended up turning on me for not taking her to a casino to gamble and she gaslighted me badly.