My aunt is grooming me and kind of ruining me

I am 15 and tge act of my aunt abusing me started since when I was 13. She did a lot of things that used me excite me but now it feels like it is something I want but also don't want.

In the past 2 years my mother is sick and cannot invite my groomer aunt to her regular Thursday party. My mother used to invite them every week when she was healthy. But from when my little brother was born now aged 1 year they don't come because they would have to stay wake for late hours and cannot enjoy like before.

My aunt who is grooming me is doing everything I front of others and it is a open secret now. She is doing actions like siting on my lap and even once she asked Am I feeling heavy after putting pressure on my private parts this happened in front of my mother and her mother, sometimes she don't talk to me even when we meet and sometimes she cannot stop talking. I also do things like touching her waist and butt

Now I am thinking of making a kind of deal with her that she will stay with us for some time and I can give her everything she wants.