There's only one way to find out

As you draw back, slowly dragging the heavy weight of your cock over her body precum drips from the head, coating her breasts and stomach. Releasing her ankles to guide your monster with both hands, she takes her chance to scramble back up the bed. "One second! Let's think about this, that thing is nearly as wide as me now.."

But you're not in control anymore. The parasite is. You climb onto your bed, the springs complaining as your weight was now drastically more than it was at the start of the day. Your huge figure advanced, filling her vision in every direction as with a growl you grasp her ankles again and pull them wide open presenting her beautiful pussy to you.

Not wanting her to escape again you kept hold of her, annoyed that you couldn't guide your unwieldy monster properly. But little did you know, the parasite had already grown you in other ways. Strands of muscle had started to develop inside your cock as the growth had got out of control and that desire to aim yourself made that apparent.

Like a mutated python, your dick raised itself in the direction of this poor woman's exposed pussy and as you shuffled yourself forwards it aimed directly at her. She watched with wide eyes filled with terror but also absolute desire as the dominance overwhelmed her.

The fat head made an audible slap of combined fluids as it pressed against her hole. She whimpered and you groaned deeply, watching it nestle between her legs and slowly writhe back and forth of it's own accord. The hormones flooding your system made it hard to think at all as the veins and actual muscles on your member visibly throbbed and pulsed. You started to pull her legs back as you thrusted.

The entire length compressed and squashed down despite how hard you were, the **** of your thrust and the size of her pussy gave it no other choice. With a roar of frustration you drew back again as your cock seemed to rub back and forth between her lips of it's own accord, looking more and more soaked as it did.

"Fuck, fuck, fuck, this is a horny weird nightmare. All I need to do is wake up. Fuck. Or not." She babbled as she watched. "I hope this is a dream, because I'm definitely going to die if not" despite her words she wasn't trying to struggle and even laid back, reaching between her legs to spread her lips further.

You just grunted as your muscles swell and strain from the effort and her reaction mirrored yours, as you watch a look of concentration lock onto her beautiful features, her eyes closed tightly. Seconds pass by as you grind against her, your cock refusing to give or slip past. It feels attached and the only way it was going was in. Seconds turn to minutes as you keep just drawing back and thrusting against her soaking but unyielding hole.

Finally and reluctantly, something gave. With a loud, wet pop the head squeezed inside her stretched, overtaxed pussy as she let out a primal scream at the intense pleasure and pain that wracked her body. Likewise, you let out a long deep groan as the heaven of her pussy squeezed you so tightly you though you might cum right then.

Looking down, the sight was obscene. Your cock was easily as thick as her thigh and the remaining brutal length sat outside of her ominously. Her lips were stretched thin and her whole body was covered in a sheen of sweat with a deep blush across her chest and cheeks. With wide eyes she stared into your soul and squirmed furiously. "Fucking fuck! It feels like I'm giving birth in reverse! Fuck!"

You shifted, leaning forwards and releasing her legs you bring your huge arms down on either side of her. You come face to face with her despite the remaining length still outside of her forcing you to be a full foot lower on the bed. Looming over her you chuckled "don't be ridiculous. It's obviously bigger than a baby"