Mrs. Stevens wasn't pleased with what Denis had done. She had stomped down on the floor causing her newly improved assets to jiggle "I am trying to conduct a math class. It is of the utmost importance I continue with the less without interruption. Making Andi into an hyper-sexual version of herself has nothing to do with trigonometry." She stated matter-of-factly. David was feeling some relief that some order was returning. "Now we're forced to change the lesson to something more suiting for your taste. I hope you are happy." She noticed Denis' bulge growing in his pants. "I see this is all very arousing for you Mr. Watson. You are going to have to take care of that, so I will be teaching you how. Welcome to sex eduction class, our first lesson is on the art of self-sex, or masturbation as it is called." David felt his heart sink as even more order was being lost in favor to getting Denis off. The teacher continued. "Now Denis, Andi, please come up to the front for a demonstration." Denis walked to the front with a tent pitched under his pants. Andi soon followed. Mrs. Stevens continued. "We will be doing a partner exercise. Denis you will be asked to masturbate while looking at Andi. You cannot touch her but since you have powers over her you may pose her to your liking. This will help you in expressing your urges when a female body is not available. Class, take notes."
David found himself actually writing down in a notebook. He was disgusted that he had to watch this but could not look away. His own mother was turning his brother into a playboy model and there was nothing he could do but examine the process.
Denis on the other hand was enjoying this. He dropped his khakis and boxers and began to massage his cock. Andi lost complete control over her body. She had turned around and was shaking her butt around.
"Ahhhh!" Andi screamed. "Why can't I stop shaking it, this totally isn't..."
She suddenly turned around, put her hands on her hips and gave an exaggerated kissy face toward Denis. She tried to mumble but her plump lips were frozen in place. She found her self compelled to prop her leg upon a chair that appeared next to her. As Denis jerked off furiously she ran her hands up and down her nylon encased legs, followed by gently massaging her breast. She then went down on the floor, laid on her back displaying her grown body to Denis. She spread her legs open and slipped one hand under her panties, and another under her bra and started masturbating as well. Simultaneously they both orgasmed. Denis' cum shot all over Andi's leggings.
Mrs. Stevens gave them a hand. "Good job students, A for you Denis."
Andi got back on her feet. "Shucks, what does getting cum on my leggings have to do with a science experiment."
The students went back to their seats. Mrs. Stevens was about to continue her lesson on self-pleasure when...
