"Fuck his pretty little face!"

"His ass is still your property, sis." Sandy says and begins to unbuckle her belt.

"Besides, I don't want to make it too loose for you again.". The sound of that makes you shiver at the thought of what she'll be stuffing down your throat.

You don't have to wait long to see it, as even flaccid she's bigger than you've ever been. Judging by the fact she wasn't wearing any underwear under her jeans, you assume she's still planning on stretching some lucky guy's ass. After all the unwanted fucking you've endured today, you're now eager for more.

While you're too busy contemplating this in your mind, Sandy begins slowly stroking herself, pumping that blood in her penis in preparation for your drooling orifice. Before you can enjoy the view any longer, Carla reminds you that your ass isn't doing it's job of pleasing her and she lifts you off the bed with her strong arms.

"Let's get you in a proper position. Loosen your cute little pucker up." Carla says and lowers you on her fuck-pole, unsuccessfully, only sliding between your butt-cheeks and on your back. Clenching your anus was a bad move, because Carla is not pleased:

"Bad toy! Keep it up and you won't get your reward."

"That's right," Sandy interjects, "If you don't play nice, I'll have to cum directly down your throat and deny you the taste. I keep a special diet just to make it taste better. Now be a good little ****, take your seat and start licking my balls to help me get hard."

That little stunt you pulled, getting Carla's penis sliding on your tail-bone pushed your own arousal above your thinking mind. You're not about to deny these smoking-hot ladies again. Carla raises you once more and this time, without resistance from you, impales you properly on her shaft. Seeing you've accepted your fate, Sandy comes closer and sticks her crotch in your face. Not one to back-out on your word, you start licking on her shaved nut-sack. You don't even notice your left hand has grabbed hold of her cock and is stroking it, until Carla starts moving her hips and pistoning your behind. In your arousal you reach with your other hand and lift Sandy's balls to give her a nice long lick starting at her labia and moving through her clitoris, up to her testicles and hardening member. She takes this as a sign you're ready and when you reach the tip, she plunges it in your mouth. When you feel the taste of her pre-cum, you decide you must have this. She was telling the truth and you now want to taste the real thing.

"So long as I'm not fully hard yet, this might be the right time to train you how to deepthroat a girl." she says to you.

Not fully hard!? Is she planning on suffocating me with this thing? you think to yourself as you moan from your dual-sided stimulation.

She pushes your shoulder down to change your angle and straighten your throat, then pushes her member deeper inside you. It's obvious you're not her first trainee, as she gives you breathing breaks just when you need them. Fortunately you're a good student and learn how to pace your breathing and your sucking. That's right, your sucking. By the time you realize it, you've already begun moving your head up and down her now fully-erect cock on your own volition.

"Where did you find this guy, sis? He's a natural!"

"He was hiding in the girls locker room at the school gym. It was erection at first sight." says Carla, laughing at the ordeal.

"I told you locking the boys locker room early would help you get a new boyfriend, didn't I?" you hear from Sandy. You've been set-up! Well you'll show them! You summon all the strength you have left to try and get off that pole you're sitting on, only to find your chin slapping into a pair of testicles and you fall back down on your new girlfriend's lap. You fail so miserably, that the girls actually think you were trying to please them better, because that's all you succeeded in. Impressed that you've taken her all the way in, Sandy pets you on the head as if you're a cat, then grabs your head with both hands and starts pumping you roughly. All this extra movement provides her little sister with enough stimulation that with little warning she arches back and shoots another load of white goo in your bowels. Feeling so full, you're almost ready for your own orgasm, but you're not quite there. Then she relaxes her nice warm breasts on your back, and the mental image of that sends you over the edge, spraying the remainder of your nearly-depleted balls between Sandy's legs, luckily not hitting her jeans on the floor.

Sandy slows down to look for any damage and says:

"Looks like you narrowly avoided a punishment there. But seeing as you've been a good fuck-toy, here is your reward as promised.".

You had forgotten about that. Her promise of the sweet-tasting love-juice you sampled earlier. She gives you a few more full-length humps to get herself over to orgasm and pulls just so the head of her prick remains in your mouth and releases your prize. You are certainly not disappointed with the way this day has turned-out for you. You got to have so much sex already, sucked-off some delicious girl-cock and it's not even dark yet. As you drink gulp after gulp of dick-milk, you settle on forgiving Carla for her trickery. She has already pulled out to take a break and is lying on the bed next to you. Saving the last dose of her sister in your mouth, you lean over and kiss her, snowballing her with her big sister's spunk. Surprised at this show of love, Carla can't help but moan during the very-wet kiss. With that you collapse on her bed, using her breasts as pillows.

"Mmm! I've never tasted my own sister before. Sandy, you've gotta share that regiment with me some day."

"Sure thing. I'll just send you the link to the article on your email. You keep that boy on a tight leash now! Don't want him running-off to another girl now that he's not afraid of cock any more." says Sandy as she tucks-in her softening member back in her jeans. Before today there was little danger of that, as you were hoping to meet the rare, passive type of girl, who prefers to receive instead of give. Now she may be right.

"Well, I'm off for the evening. I should be back around ten, hopefully with some energy left for more. Should I bring some condoms in case you want to take his last virginity?"

"Sure. If he can't stay for the night, we'll just save them for another day." Carla responds.

Hearing that, you decide you'll definitely call your mother to ask permission to sleep over. But not now. You're too tired to even reach for your phone. You need to replenish your energy somehow. Taking a bath would help. So would some food.