should i sex my step sister?

[Troupe1231]

So im 18 and my step sister whom is 16 keeps touching my dick whenever were in a room alone. i told her that i can get in trouble if something ctually goes down inbetween us. she claims shes almost 17 so its ok but thats still below the age of consent. but i recently turned 18 so if i where still 17 i would pound the shit out tht. only if she did this 1 month ago. my dad doesnt know and she says she wont tell, but i dont trust her cause shes kinda mean sometimes. the position im in is not fair. help!!!!!!!!!!!!!!!!!!!!!!!!