Steve enters without knocking

The door swings open. Steve walks in, his phone held in front of him at arm's length, recording.

"Hah!" he crows. "I fucking knew it! Jake was taking too long--so where else could he be? I have to say--I approve of your choice, sis."

"Put that away!" Bethany hisses, her face blushing. However, she doesn't pull off my cock, or dive under the covers, or anything like that.

"Why?" asks Steve. "Seems to me the damage is already done. Mom and Dad are going to be super interested in the footage I already have--seeing what their perfect little princess gets up to in her room."

"You wouldn't dare!" Bethany scrunches her face, thinking furiously. "He's... He's making me do this! With that card of his! I...can't refuse!"

"You don't seem very distressed, if you ask me. Anyway, I doubt Mom and Dad will care. All that matters is you're breaking the whole 'no fucking in the house' rule."

Her shoulders slump, and her pussy contracts slightly, sending a pulse of pleasure through my belly. "Alright, you little twerp. What do you want then?"

"What I want," says Steve carefully, "is for you to do what you were already going to do--show my best friend here the time of his life. You're going to fuck him, and I'm going to capture every second. After that...well, we can discuss later."

"Fine," Bethany sighs. She starts to bounce on my cock. Steve positions his phone for a close-up of her from behind, capturing in obscene detail the motion of her ass clenching and unclenching--revealing brief glimpses of her dainty brown star--and of her pussy lips clinging to my shaft as she pulls away. Even separated by the condom, the squeeze of her inner muscles around my glans feels heavenly. I close my eyes to concentrate on prolonging the wonderful sensation as long as possible.

"Hey, Jake." Steve's low voice breaks my focus. I turn, glassy-eyed, to look at him. "Wanna make my sister come first, before you bust your load?" He gestures with his head. "Grab those hooters of hers. Really dig in there. Twist the nipples. Nothing will turn the slut on more."

I don't think. I simply follow his advice--raising my arms to grab two handfuls of mouthwatering tit-flesh. Bethany moans, lost in her own world. My fingers massage her, working their way closer to the center, brushing over her pale pink areolae. At last, I grab each erect nipple between thumb and index finger and pinch down, hard. She cries out and grinds against me even harder.

We keep fucking, and Steve keeps recording. In spite of my best efforts, I'm getting very close. Desperate, I pinch Bethany's nipples again. And then again. That seems to do the trick. Her cry this time has a different timbre, and her entire body shudders in relief. She stops thrusting--leaving my entire cock hilted inside her--yet her pussy spasms around me, pushing me over the edge. My balls contract and send their sperm shooting down my shaft and into the tip of the condom.

Steve puts his phone away and pats both of us on the arm. "We'll talk later, Annie," he says before exiting the bedroom, closing the door behind him. I'm not sure if she heard. She's still gasping and shaking, slumping down on top of my chest, allowing my softening cock to slip out.

When we've both recovered, I look at her with guilt. "I'm sorry I got you in such trouble."

She sighs. "It's not entirely your fault. Still...you owe me. I need to get that little shit's phone away from him ASAP, and you're going to help me."