At home

You stride out onto the streets, not bothering with clothing, as you leave Amy's house and head for home. You hadn't been very interested in **** before, but this transformation has unlocked so many more doors for you, and top of the list is impregnating your hot older sister.

Amy and Cassy stir from their slumber to obediently follow you, caressing your long, powerful legs, your washboard abs, your large, round bum. (They can't reach much higher.) On the way you fuck three pedestrians, two runners and a cyclist. When your cum causes them to freeze, you raggedly order, "Become super sexy. Heal any damage. You're my fuck-toy now."

You do eventually make it home, however, licking your lips in anticipation. You bark at your companions to wait outside, then duck through the front door.

"Hey, Michael, is that you?" calls a melodic voice from the kitchen, then giggles. "I wonder what you've been doing all night..."

You round the corner into the kitchen, and drink in the sight of your older sister hungrily. She could probably top anyone in the school, even with the physical enhancements you've given Amy and Cassy. Taylor has her creamy, toned legs up on the table (crossed), exposing their full, impressive length as they gleam in the sunlight. Some short shorts serve only to emphasise the round shape of her perfect butt, whilst her white T-shirt is tied up to expose her fit abdomen. Two gorgeous, perky tits strain against their cage, large nipples clearly visible to you - she's clearly not wearing a bra. Finally, atop her shapely shoulders rests a gorgeous face, as Taylor's bright blue eyes take you in with shock, framed by luscious sandy-blonde hair.
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"Wait, Michael?" she double-takes. "You're..." she takes a breath, unknowingly inhaling your pheromones, which have grown ten times as powerful. "You're so hot now," she finishes, her eyes roving your Amazonian body.

"I'm Mikaela now. Come here and I'll fuck you real good," you say sultrily. Taylor beams happily, and scrambles over to you, her mouth immediately going to your clit whilst her hands stroke your huge cock. You knead your voluminous tits as she does so, grinning fiercely at the pleasure your sister is giving you, but her hands are woefully ineffective against your cock, and your carnal desires are overwhelming.

"Come here." you grunt, easily lifting your sister up and slamming her onto the table, sending crockery flying to smash against the walls. Taylor looks back at you, her breasts heaving and her mouth open in a wide grin of anticipation. She doesn't have to wait long.

When you first try to thrust, your hormone-addled brain doesn't think ahead that your massive pole won't fit between Taylor's legs, let alone in her cunt. Grinding your teeth with frustration, you will your glans to shrink, and it instantly complies. Now fuming with impatience and lust, you slam deep into Taylor, instantly filling her up and causing her back to arch. Bearing your teeth in feral pleasure, you begin pumping into her wet pussy, feeling your dick growing of its own accord. As with Cassy, you feel Taylor's insides stretching to their limit and beyond. If you had the wits, you might have pondered how she could withstand such ****. You would have eventually come to the conclusion that Cassy's reprogramming of your body, for it to fulfill your every need, has enhanced the power of your pheromones and bodily fluids, such that they instantly begin to improve your partner's physical ability, in addition to a sexual compulsion towards you. Less and less do you need to reprogram your victims; your mere presence starts to enable them to accommodate your huge cock, and become sexy enough to be a worthy fuck.

You hiss in pleasure as you feel your tip pushing through Taylor's cervix as you grow into her abdomen, your sister shaking and screaming as she continuously orgasms around your pounding cock. You could easily go further, rip right up to her throat like you did to Cassy, but your Alpha instincts override your lust. You want to make her pregnant, so that's what you do. Taylor screams until no sound comes out as her belly inflates with the volume of cum, your tree-trunk between her creamy legs preventing any from escaping. When you pull out of your gasping sister, however, that thick fluid comes flooding out of her spasming cunt. You look at her body, gleaming butt and tits already swelling, and feel satisfaction joining your lust, as you know she will carry your offspring, a mighty child who will grow to rival your own power.

Despite your emotions now permanently raging through you, your sensitive ears pick up a muffled gasp behind you, and you whirl around.