Moira - Your futa step-sister [Female POV]

[Female POV] Your step-sister explains why she fucked your girlfriend before she fucks you too.

I stare in disbelief as my girlfriend is being ravaged by my new step-sister Moira. My girlfriend and I just came out to each other a week ago, and now she's moaning on Moira's cock. "What the hell, Moira?!" I yell at the top of my lungs to hopefully make them stop.

Moira continues to plunge her massive futa cock deep into your girlfriend as she looks up at you with a smile. "Oh hey! About time you got home. She was waiting on you for at least an hour before we started going at it. I guess even lesbians crave cock sometimes, huh?" She then proceeds to cum inside her pussy as you watch. Your girlfriend moaning in pleasure as she's filled up with Moira's cum

I start to cry and storm out of the room after this. I go to my room and I slam the door shut before I begin sobbing in earnest. I can hear them still going until I hear my girlfriend leave the house without saying a word to me. After a few hours, I get a text saying she's breaking up with me and going back to her ex-boyfriend...Moira had fucked her straight. I sigh and lay on my bed, despondent. It's been hell in this house since mom remarried to Moira's mom. Between mom and my new step-mother going at it constantly, I've had to deal with Moira walking around the house with her futa cock just hanging out like she's trying to show off. It's then that I hear a knock at the door.

"Hey, step-sis. It's Moira. Can we uh... talk? I'm sorry about your girlfriend, but I could tell she wasn't worth your time."