Is it wrong to not send money to parents every month?

For context : I am 30f. my father is retired and gets monthly Rs 40000 as pension. And my mom is housewife. I have an elder brother who sends monthly rs 10000 to 20000. My parents live in tier 2 city. The reason I do not send is I have already gifted them a car worth Rs 13 lakh last year, and also send them 2 lakhs to clear some loans. I feel guilty for not sending. But the thing is they have always discriminated between me and my brother. Growing up my brother got his own bedroom, while I had to use the room common to everybody. When I asked my mom why is this the case she straight up told me “anyway you are going to get married and leave one day, so why do you need a room”. But My father strongly believed in education, so no expense was spared when it comes to education. And he made sure we studied well and got good jobs. But aside from education, there was always discrimination for me being a girl. And I know that in future all the property will by default go to my brother. I want to know if I am in the wrong here.