You are lying next to your girlfriend on the bed. It’s warm, so you are wearing only a pair of silk boxers, and she’s in her bra and panties. It’s been a long day, and you are exhausted.

She traces a finger down your bare chest and toys with your belly button. “Want to play?” she asks in a cute voice.

“I’m tired,” you reply. Frankly, you’d rather watch TV for a while and then go to sleep.

She won’t be put off that easily. Her hand slides under the waistband of your boxers and gently grabs your flaccid cock and balls. You offer no resistance as she idly plays with your junk. Under normal circumstances you would be rising to attention, but not tonight.

Your girlfriend tries to get a rise out of you for a couple of minutes but is unsuccessful. She pouts, then giggles. “I bet if Sandra was here you’d want to play!”

Your dick twitches involuntarily in her hand, and you tense up. The mere mention of Sandra’s name causes a little flutter of excitement in your belly. But you’ve never admitted these feelings to your girlfriend!

You try to feign nonchalance. “Who?”

Your girlfriend starts scratching your perineum and scrotum with her nails. “Don’t play coy! Sandra. I know you like her. I bet if she was here you’d want to play!”

“No…” you grunt unconvincingly. Your dick swells again, and your girlfriend wraps her hand around it.

She laughs. “I just have to say her name, and you get hard! You like her, admit it!”

You could get yourself in so much trouble. “I don’t know what you’re talking about…”

Your girlfriend leans in and whispers in your ear. “Sandra. Sexy Sandra. She’s so hot with those beautiful tits of hers!”

Each time Sandra’s name is mentioned, your dick throbs in your girlfriend’s hand. At the mention of her tits, you exhale, half sigh, half groan.

Your girlfriend giggles. “Now you’re waking up. It’s okay, I know you like her.” Her breath is hot in your ear. “You wanna fuck her?”

That butterfly feeling surges in your stomach and your heart rate increases. You feel a little faint. You can’t believe your girlfriend is talking like this.

“You wanna fuck Sandra? Fuck that tight little pussy of hers?”

You gasp. Your cock is now fully erect; in fact, it’s harder than it’s been in quite a while. Your girlfriend is pumping it steadily.

“Wow babe, you’re hard as a rock. You must really want to fuck Sandra. What is it about her? It’s her boobs, isn’t it? She’s got nice boobs. Better than mine?”

“No…” you reply diplomatically.

“Hmm.” She doesn’t sound convinced. “That’s okay, I know she’s got nice tits. I bet you’d like to see them, wouldn’t you? If she got them out for you, what would you do? You want to suck on them?”

“Oh yeah…” you groan, deciding to go with the flow.

“You want to suck on Sandra’s sexy tits? I bet her nipples get really hard. I bet she likes it when men bite her nipples. You want to grab Sandra’s tits and suck and bite on her nipples?”

“Uh huh…” A dribble of pre-cum runs from your knob and trickles over your girlfriend’s hand.

“Then what? You want to fuck her tits? Stick your dick between them and fuck Sandra’s tits until you shoot all over her face and neck? Cover Sandra in your cum?”

“Oh God, yeah…”

“Imagine Sandra’s pretty face all messed up with your cum. I bet the bitch would love that. I bet she’s a real cumslut at heart.”

You groan. Your girlfriend is jacking you furiously now.

“But I know what you really want to do. You want to fuck her properly, don’t you? Maybe bend her over, rip off her panties and fuck her tight little cunt from behind? Yeah? Fuck Sandra like the bitch in heat that she is? Shove your cock in her so deep and make her scream?”

You close your eyes and imagine that you are pounding Sandra doggy-style, your hips slapping against her ass cheeks. You lean forward and grope her dangling breasts, pinching and tugging on the nipples, before grabbing her by both elbows, pulling her back and upright, shoving your cock as deep as it will go…

“Or maybe let her do all the work?” your girlfriend continues. “You’d like that, wouldn’t you? Imagine Sandra riding you, sliding her wet cunt up and down on your cock, with her tits bouncing up and down…”

You visualize Sandra straddling you, writhing impaled on your throbbing shaft, squirming her hips around. You grab her soft ass and buck your hips up to meet her downward thrusts, slamming balls-deep inside her again and again and again. It’s too much for her. Her face is so beautiful as she cums, her pussy twitching around your rod. Then she falls forward onto your chest, sweaty and exhausted, her breasts pressed into you. You keep thrusting upward into her, one hand full of her hair, holding her head against you, feeling her panting breath on your chest. You groan as your balls boil over and you fill Sandra’s pussy with your hot, sticky cum.

“Oh Sandra!” you groan. Your girlfriend keeps jerking your cock as you shoot your load into the air and it rains down on your stomach and thighs. She continues long after you’re spent, while you twitch and tremble, until the sensitivity is unbearable and you place your hand over hers to make her stop.

You both lie there quietly while your girlfriend plays with your cum, making patterns with her fingers. Then her hand slides down to your balls and she grips them tightly, digging her nails in.

“So I’m not enough for you, is that it?”

Oh shit.