Sam

Sam continued to struggle, trying to get free which caught Thalia's attention. "You seem tense, you need to relax," she said with a smile before she looked down at the book.

The book began to glow before this little green puff of smoke began to arise from the center. It flew up and circled her finger a few times as she admired it for a moment. She began to walk towards Sam as he watched, nervously.

"Is my little pet hungry?" She asked as the little smoke ball seemed to get excited. "Well, then I think you'll like this."

Thalia got down on her knees and gently blew the little creature toward Sam's small flaccid penis. Sam and everyone else watched in horror, not sure what she was doing or what was going to happen. Sam couldn't help but think of anything other than her comment about the smoke ball being hungry.

It flew out and began to hover around Sam's penis. He was so frightened that his dick seemed to shrink even more than usual, but soon he started to feel the little smoke ball gently sliding against his skin.

"What........ shit...... what is this thing?"

"Gaudens Parasitus," she said.

Andy suddenly remembered that phrase from the book. It was one of the first spells he wanted to try. It was called the Orgasm Parasite.

"What is that?" Sam asked nervously as his penis suddenly became erect.

"Oh don't worry, you are going to enjoy this," she said with a smirk before she said: "procedere."

The ball of smoke began to grow and was wrapping around his shaft, massaging it even more as Sam was embarrassed but his predicament while his friends all stared at his sex organ. He was also frightened by what this thing was going to do to him.

"Procedere," she said again before standing back up and turning her attention back to Andy. "This could have been you, you know.

The more she said that word, the larger the smokey creature got and the more it was doing to Sam's penis. It was squeezing and massaging it, making Sam squirm and moan. At one point, Andy was sure the little smokey green creature was tickling Sam's asshole as well.

"You like that?" Thalia asked, smiling as she began to notice everyone else in the room starting to get hard as well. "Oh my, do the rest of you want a taste?"

"Thalia, please stop this," Andy pleaded. "These are my friends, you can do what you want to me, just please......"

"What? You don't want your friends to feel the pleasures of my book?" She asked.

Andy knew that the Orgasm Parasite could be dangerous if left unchecked, so he wasn't sure if Thalia would let them all go after she'd had her fill.

"Sounds kind of selfish if you ask me," she said looking at Andy with a cold stare. "Procedere!"

Sam let out a yell as the green smoky blob began to transform, growing arms and sprouting what looked like a head with two red eyes and a large mouth. A smokey tongue began to flow from the mouth of the creature wrapping around Sam's shaft. It played with Sam's testicles with those hands as Sam was practically begging for release.

"Shit..... this feels so....... fuck!" He yelled out as his cock dripped precum all over the floor. "I'm gonna....... I want to......."

"Oh my dear boy," Thalia said with a smirk. "You aren't going to cum yet. It won't let you."

"What?" Sam asked looking panicked.

"You want to cum? I can make that happen, but how badly do you want it?" She asked as the green creature continued to unmercifully play with his cock, driving him mad with pleasure.

"Thalia, stop this!" Andy begged but she ignored him.

"Tell me, Sam," she said placing her finger under his chin. "How bad do you want to cum?"

"I...... please, I'm begging you...... let me cum!"

Thalia placed her finger on Sam's chest, sliding it down his stomach before gently along his shaft. She rubbed the tip of his cock, seeing his precum drip from her fingernail before tasting it.

"Oh my, I think you're going to like this one," she said looking down at the creature that had his cock practically vibrating. "Procedere," she said with a smile before backing away.

The creature suddenly let go of Sam's cock and backed away a little. His penis was red and dripping like crazy as he wanted nothing more than to cum, but now he was wondering what was going to happen next as the creature let out a laugh before it began to spin.

There was a small green tornado in front of Sam's cock before it touched his urethra. The creature was flowing inside his penis as he screamed. The others were unsure if his screams were that of pleasure or pain.

Once the smoke was gone, they watched Sam's penis as it twitched, unsure of what was happening. Sam stared down at his cock with his mouth wide open, waiting for whatever was going on.

His cock twitched again before starting to grow while the veins turned green. His precum had also turned green as it dribbled out all over the floor. Sam began to grit his teeth and moan as his cock seemed to have a mind of its own, twitching and growing before the arms sprouted from the sides and the tip started to transform into a mouth before two eyes popped out of it.

"What the fuck?" Ken shouted, watching his friend's penis turn into a monster.

"Fuck....... FUCK!" Sam yelled as his monster penis moved and twitch violently all while laughing hysterically, causing intense pleasure while driving Sam mad.

"I love watching these creatures work," Thalia said with a sick smile as Sam's cock was now 5 feet long and a foot thick. "I think that's enough," she said as Sam begged for release before his cock began to buck like a cannon finally spewing gallons of green cum all over the ceiling while he screamed as loud as he could.

"FUCK........ FUCK.......... I...... CAN'T.............." He screamed while soaking the ceiling and wall in green slime while everyone just watched in horror.