so i get my hands on my stepsister gianna's report card for college, turns out our parents are paying for her to go out and party while failing every class. she claimed to be studying, but i knew she was going out partying, [***] and probably getting fucked by random guys instead of going to class. i told her i was going to show the report card to our parents and she was begging me not to. so i came up with a deal. i told her if she sucks my dick, i wont tell our parents about her failing. turned out to be a great deal for the both of us