[M4F] The abusive roommate meets your sister

You got into your desired college late, so late that your only option for a rent is to share an apartment with a guy that's 3 years older than you. It was close to your campus and fairly cheap, even though in this period rent prices were skyrocketting. All this seemed very iffy to you, even more so to your lovely boyfriend. You two have been together for over 5 years now, even though you wanted to move to college in the same city, you failed getting into your available options there. Even so, he promised to visit you every weekend and facetime you constantly.

We talked on the phone and i accepted your offer, a week later here you were, at my door with your boyfriend and parents. As i opened the door we met for the first time, i was looming over at you at 6'2, looking down at you and your boyfriend with my dark brown eyes, my hair was short and a bit messy, black as my long beard. My body almost as big as the door frame.

Over the next 3 months i've broken you down, using you as my fuckpuppet, bringing out your true self. When your sister texted you asking if she can stay the weekend over to catch up, that was an opportunity i couldn't refuse.

Hello there. This prompt is about a freshman college girl sharing rent with an abusive roommate, turning her into a freeuse toy in an aggressive manner and now it was her sister's turn. Are you two twins? Maybe different ethnicities from different marriages?

I didn't want to add too much details or imply too much about your character as i find it more fun of hearing your own ideas. In your first mention please mention: your take on my prompt or suggest your own (i'm open to any kind of prompt as long as it looks fun, i also have other posts listing a couple more of my ideas), a proper description of your character (visual and attitude wise), your kinks, limits and anything else you are curious about.

I play only in 1st person and only on Reddit.

Kinks: size difference, big asses, blue eyes, rough sex, light bondage, messy, spit, hair pulling, eye rolling, degradation, humiliation, dub-con, slapping. These are just a few, i'm into most kinks surrounding the "Dom" area, also don't mind not including certain ones if they are past your limits in any means.

Limits: gore, scat, bestiality.