I need help

So I’m new to all this and I have always had an incest fantasy, yes I know it’s wrong but it just makes me horny thinking about the risk.

I wanted to ask for help bc I want to know how I could get my cousin to SMD or something like that, For reference she is a 17f and I’m a 16m. She is a very attractive girl, she’s really skinny, doesn’t really have that big of an ass or tits, but she’s gorgeous, And she has DSL’S (dick sucking lips)

I get this feeling around her that I don’t get around any girls, the things I think about with her is mind blowing, I’ve thought about “accidentally” sending her a dick pic but I’m nervous she’ll tell our family but me and her have a very strong relationship, I call her beautiful and all those cute nicknames and she doesn’t think it’s weird. Obviously it’s not but I wanna know how to push it further. Please help!!