Stretched

As soon as she turned 18, Demi found out how much she loved then craved anal sex. She loved it so much, she would anally masturbate when she was lonely. It was her preferred sex act, and she used anal plugs to the point she was addicted to having things up her ass.

Her anus got more and more stretched out.

It got to the point where she had to take two cocks up her ass just to get off.

And she would jack two guys off while two more fucked her anus until the two cocks in her hands replaced the cocks in her anus.

No one knew of her fetish or ability to take multiple cocks in her ass, and she would be mortified if word got out.