It would be rude not to

You’re breathing so hard you’re almost hyperventilating as your sister practically begs you to treat her like a fucktoy ****. You tangle your fingers in her dark hair. You started all this because you fantasized about having a **** who would worship your cock. Now Abbie is doing things to your dick with her lips and tongue that feel better than you ever imagined. You wanted a ****. She always fantasized about being one. She couldn’t have lied about it, since you told her to tell you the truth.

Your fingers clench, gripping your sister’s hair tight. You drag her forward onto your cock, pressing deep into the back of her throat. “Take it, ****,” you growl. You hear a ‘glrk’ escape from her as she gags and tries to swallow on the head. You pull head back slowly to let her gulp in a breath, then yank her forward again. She lets out a little muffled yelp from the sting on her scalp, that’s cut off by your cock driving into her throat again. Her hands clench on your thighs. She sputters around your cock as you drag her head back and forth, again and again.

After fucking Abbie’s face hard for a while, you pull her back until the head of your cock slips from between her lips. The coating of thick spit and precum on your cock dribbles down onto her chin. “I want you naked, now, ****,” you order her.

“Yes Master,” she coughs, nodding enthusiastically. She hurries to strip off all her clothes and is soon kneeling naked in front of you. You kick off your sneakers and pull your feet out of your jeans and underwear that are tangled around your ankles. You grab the jeans to fish a condom out of your pocket.

Abbie tells you, “I’m on the pill, Stretch. You don’t need that.” She’s panting and grinding her fingers over her pussy. You can see her inner thighs are glistening with her juices running down them.

You shake your head. “Remember, that spell can overcome birth control. I don’t want to take any chances.” You tear open the wrapper and roll the rubber onto your hard cock. “Now get on the bed, on your knees and elbows.”

Abbie pouts a little about the condom, but accepts what you tell her. Her face lights up when you order her onto the bed. She crawls up and takes the position you told her. You stand behind her grip her hip and pull her back to the edge of the bed. You press the tip of your cock to her slick, puffy pussy lips. She squeals, arches her back more, and pushes her ass back at you, trying to push onto your dick.

You don’t keep her waiting. You thrust forward and bury your hard shaft deep in your sister’s warm, wet, tight cunt. You grip her hips and start pistoning in, hard and fast. Yanking her back to meet your thrust each time you slam forward.

Deep, rhythmic throaty moans of “oh,oh,oh,oh.oh…” are **** from Abbie each time you drive in. Your fingers are clenched tight, digging into her soft skin. You pause your thrusts, pressed in to the hilt, grinding your crotch against her ass. You raise one hand and bring it down —SMACK— on her firm buttock. She cries out. “AH!” Her body shudders. You feel her pussy spasm and clutch your stiff rod tight. and a gush of juices wash over your cock and run down her thighs.

You rub the red handprint you left on her ass cheek. “What do you say, ****?” you demand.

“Thank you, Maaaasterrrrrr…” she groans

“Good girl.” You raise your hand and bring it down again —SMACK—

“OW! Thank you! Master!” Abbie barks out. She tries to rock back and forth onto your cock. But you’re holding her by the hip with her ass pinned against your crotch. She can’t generate much movement.

“Keep still and take your spanking, ****,” you command her. She whimpers but stops trying to hump back against you.

You slap her ass three times in quick succession —SMACK—SMACK—SMACK— moving from one buttock to the other then back.

She squirms a little twisting her hips back and forth, but makes a good effort to keep still. “Thank you thank you thank you,” she says breathlessly. She tenses and you feel her cumming again, with another warm flood over your dick and balls.

You start to thrust again — fast, urgent rutting. Your crotch smacks against her ass, jolting her body over and over.

“Please cum in me Master, please, please, I want to feel it. Neeeed to know I pleeeeased you. Pleeeeeaase…” She’s almost yowling like a cat in heat.

You keep pistoning into her relentlessly, just because you can thanks to the Inuus spell. She cums hard, groaning, rocking, and squirting around your pumping shaft. Then you SLAP her ass and order her, “Cum again, ****. Now!”” Sending her into another shuddering, clenching, flooding orgasm immediately.

She’s gasping for breath when you drive in deep and let yourself go over the edge. Your cock pulses and throbs as you cum. That sets her off again, you feel her pussy spasm and gush, but her exhausted body just trembles now.

You stand there for a moment or two, catching your breath, enjoying the feeling of her warm pussy around your spent cock. You stroke your fingers gently over her reddened ass cheeks and murmur “Good girl.”

When you pull out, you see the condom is broken. “Oh fuck,” you say, and wonder how powerful that magic is. “You need to get Plan B tomorrow, Abs.”

Abbie is sprawled on the bed on her belly, with a sheen of sweat on her skin. She nods and pants.

You both get cleaned up, dressed, and head home. Neither of you talks much during the ride, words don’t seem adequate to how you’re feeling. Abbie stops before driving onto your street so you can share a long, deep kiss outside of view of your house.

When you walk in the front door, you hear your mother’s voice from upstairs. “David, come here please.”

You climb the stairs and find your mom sitting in your desk chair. The computer screen opened to the webpage that was still up when Abbie pulled you out of your room. “What is this 'Enchantment of Eros' spell all about, young man?” she asks with an icy tone in her voice.