Monica's phone's running out battery!

"Julie? This thing is at 1% already" Marie says as she takes the phone. "Woah, it's gotten hot from all the call."

She's currently fucking Monica sideways. My girlfriend is lying on her side, arching backwards and pulling her legs towards her chest, tightening her pussy. She looks as if she's about to pass out of pleasure, but still does and moves as Marie commands.

"Aw, fuck" I've cum so much I've run out of semen, and my orgasms are a little painful even. Most of my loads have dried on my belly, tits, and thighs. I have several screenshots for later. "It's OK, I've loved it so much so far."

"I'll give you your girlfriend back in the morning!" Marie says without skipping a beat. "Mon! Say bye to Julie! You'll see her later!"

"B-bye!" Monica manages to say, barely lifting her face to smile as she makes a weak peace sign with her hand. She's so adorable, even on the brink of exhaustion, even under layers of sticky semen, even having been fucked for hours, she's a cute angel. The phone turns off just as she makes a last pose, and just after I've taken one last screenshot.

I lie on my girlfriend's bed. I wanna keep on masturbating, but I'm so tired. I don't know how Monica has lasted this much. Is she that much of a slut deep within? The image of Marie fucking her hard is burned into my mind, and I adore it. I wanna see her again. I want that big, strong futa to fuck my girlfriend over and over. I wanna see her completely covered in semen once again, and again, and again.

Am I making a mistake with our relationship?

I check the time, and it's already three and a half in the morning. I try to get some sleep, but Monica's moans reverberate in my head, so I can't for a while