Fucking with my stepsister next to her friend

My stepsister and I usually fuck together when we don’t have partners, it’s an agreement we have to kill the urge. Today I woke up with a desire that I can’t control and even though I know that her best friend stayed to sleepover, I want my dose of sex, I want to suck her huge tits and fuck her deep, so I will go to her room and fuck her right there next to her friend trying not to make noise so she doesn’t wake up, but I will definitely fuck her hard and leave my cum all over her hot body.