Pia watched the tentacle getting nearer her mouth.
Uh-oh, even more aphrodisiacs?
Pia was already too horny to control herself. She tried turning her face away from the tentacle.
She did not answer the monter's taunt, she was too busy moaning. As her clit was being stimulated, she flexed the muscles in her bottocks, making them briefly squeeze the tentacle teasing her anus.

The tendril continued it's slow descent towards her mouth, pushing against her soft lips, demanding access while the tendril teasing her anus slowly begins to push it's way into the rear tunnel, thrusting in sync with his gigantic cock that continued to pound her mercilessly. The tendrils around her breasts began to massage the flesh, tendril tips flicking across her erect nipples.

"Mmmph! Mmmm!"
Pia struggled to keep the tentacle out of her mouth, pushing at it with her hand and squeezing her lips toghether as well as he was able.
This was getting harder and harder as the other tentacle was forcing its way into her anus, slowly but relentlessly entering her tightest hole. She had no choice but to let out a little scream, granting the tentcle full entry.

The tendril took full advantage of her scream, thrusting into her mouth, winding around her throat just enough to avoid being bitten. To Pia's surprise, no aphrodisiac flowed into her mouth. All it did was begin to play with her tongue.

The tendril in her anus began to thrust deeper and faster while his huge cock continued at it's pace, pounding her tight pussy. The tentacle playing with her clit rubbed more firmly, encouraging the girl to play with him as well.

"Mmphh!", was all that Pia could protest, the tentacle preventing her from saying more.

This was all so wrong, yet so good. Much as she hated to admit it, she was truly enjoying being filled. Without even thinking about it, she began stroking the tentacle in her mouth with the same hand she had tried to fight it off with.
Surrendering to lust, she pushed agains the monster as it pumped her cunt and anus.

The students surrender didn't go unrewarded. As she thrust back against him, he began thrusting in perfect sync with her. The tendrils worked furiously pleasuring her even more. Her clit felt the tendril rubbing faster and harder, Her breasts being massaged more throughly, her anus pounded harder and deeper, her mouth fucked slower and gentler.

I'm glad you decided to play too, Pia. Now the real fun starts.

Only small, half muffled noises of pleasure escaped Pia's mouth. She was now completely at her captors mercy, all resistance gone.
With every thrust and stroke her pleasure increased. Her desire was like a fire inside her.
Oh my! If this keeps up, I'm going to come!

Pia closed her eyes, as each stroke against her sensitive spot and each inch of the big member burying itself in her eager pussy brought her closer to a climax.

Pia continued to throw herself against the thrusting spider, his tentacle dribbling precum onto her skilled tongue. His behemoth member began to swell and throb.

I'm cumming, Pia. Hope you're ready... He said with a dark undertone before his inhuman cock erupted, filling the blonde's pussy with cum in moments.

Feeling Siferus' ejaculate inside her, the cum filling her, triggered Pia's own orgasm. It was a fast, strong orgasm, powerful enough to make her twitch and shake a little. She not only thrust her lower body at the monster taking her, but also started to move her but in a grinding, circular pattern.

Pia's voice was muffled by the tentacle in her mouth. She once again tried to pull the tentacle out of her mouth, desperate to let out a deep groan.

His tendril slipped out of her mouth with no trouble, but before she groaned or spoke, the tentacle sprayed a load of semen, dousing her face and hair with the warm, sticky fluid.

I hope you're enjoying yourself, Pia. He chuckled, the tentacle that had sprayed her face moving to begin titfucking her.

"Ahh-aah! So..Ahh.. wrong.. but.. it feels.. so..Ahhh!"
Lost to her orgasm, this was all Pia managed for an answer. She let go of the tentacle with her hand and without thinking grasped at the other tentacle fucking her tits, squeezing at it as thrust back and forth between her soft orbs.

Siferus' assault on this girl would continue to intensify, his cock slamming against her pussy harder and faster.

Such a remarkable pussy, Pia. You're incredibly tight. He said, complimenting her. The tentacle fucking her soft breasts gyrated in her hand as it slid effortlessly between the swollen mounds. The tentacle pounding her ass somehow managed to keep in perfect sync with the behemoth cock, while her clit felt the tentacle begin to smack her love button gently.

Pia jerked as the tentacle tapped her clit. She was getting just the right amount of pleasure and roughness to sustain her orgasm a little longer.
She could feel just a taste of saltiness from the cum on her lips.

Part of her mind protested being used this way, but another part, a raw and primal part relished in the feeling of the semen on her skin and the rythm of being reamed. Se groped at her own breasts to intensify the feeling of the tentacle fucking them.

Her lust was slowly taking over her actions. This made the spider even more excited causing all his movements to speed up. All the thrusting, the groping, all of them reaching inhuman speeds, her juices squishing out more and more, the smell of sex heavy in the air, assaulting every one of her senses as a tentacle pushes back into her mouth, the tip dancing with her tongue.

Oh, how did I turn into such a whore?, Pia thought to herself. This horrible creature was taking advantage of her, but the aphrodisiac had turned her into its willing plaything.
She knew she should have resisted, but it all felt so good. Her body seemed to have completely overruled her mind.

A small drop of spittle escapes her mouth as her tongue fences with the tentacle. Her cunt makes wet noises as the huge cock is ramming it. Pia's first orgasm is subsiding, but she can feel that deep inside her, the need for more still exists.