James rushed over to help his mother up. Margaret was unsteady, but seemed to be back in control of her actions.
"James, what happened to me? What is this? Is this what you were talking about earlier?" the shaken mother asked as she was helped to a nearby chair. Margaret felt at her now flaccid penis resting along the inside of her pant leg. A small gasp escaped Margaret as her member began to stiffen again. James swatted her hand away as she moved to investigate the appendage further.
"You can't touch it mom. It will only make things worse."
"You're right, you're right. Sorry James. I'll leave it alone." Margaret promised. "Maybe we can go to my lab. See if we can figure out whatever is causing this. I'm assuming those mounds on your chest came as a result of your own changes?"
James blushed at the mention of his breasts. "Yeah, that's right."
"Well, no time to lose. Let's get going. We can be at the lab in 10 minutes if we leave now." As the mother and son moved to get ready to leave, they were distracted by a gasp from Sam.
"Sam, what's wrong. Oh no, it isn't happening to her as well is it?" Margaret pleaded to James.
As mother and son went to help Sam, they were taken aback by a low growl emanating from Sam's throat. The girl eyed the flaccid bulge in her mother's jeans. "Mom, oh my, I'm so horny. Please, I need your cock." As the girl stumbled towards her family members, it was clear that she was developing her own cock and balls in her jeans. A considerable bulge could be seen pushing out against the crotch of Sam's jeans, with a line of pre-cum oozing through the denim fabric. The bulge grew as the girl got closer. Before long, a massive tent was jutting out of Sam's jeans.
"Ignore her mom, it will only make things worse. Come on maybe if we..." James' words died as he turned to look at his mother.
Margaret was staring at the growing tent in Sam's pants. As James looked lower, he saw that his mother's penis had begun hardening again. The appendage continued to extend down Margaret's jeans as she watched her daughter. As the penis grew, Margaret's breathing deepened. The dopey grin from her earlier changes began to spread across Margaret's face again.
"Sam, you pretty. Me help you. You need help me too. I so horny" the mother mumbled.
James was taken aback at the breakdown of his mother's thoughts. The college science professor was gone, now replaced with a woman enslaved to the hormones flooding her body. Knowing what was coming, James got in between his sister and his mother. As James blocked Margaret from his sister's advances, he saw Sam's expression change.
The lustful look on Sam's face disappeared in an instance, a ferocious snarl replacing it. "I'm not letting you have her Sam. You both need to fight the changes. You're only making things worse." James was interrupted as he felt his mother begin grinding her equipment against his backside. "Mom, what are you doing?"
The gap was all Sam needed. The girl pounced past James and knocked Margaret onto the nearby couch. The girl thrust her, now massive, tent at her mother's mouth. Margaret opened her mouth wide, sucking the denim covered cock tip as readily as she could. Meanwhile, Sam adjusted her position to get at Margaret's cock and balls that were pulsating wildly in her jeans. The daughter began sucking at the appendage with gusto. James ran to the lewd display, pulling at his sister to get her away from his mother. "Mom, Sam, you need to stop this. Please!"
James continued to try to pull his sister from his mother until with a bellow; the girl thrust her cock into her mother's mouth one last time. Margaret's groans became a gurgle as Sam let loose a torrent of cum from her massive tool. Seeing his opportunity, James pulled his mother away from his sister, hoping to halt at least one family member's changes. Mother and son went down in a tangle of arms and legs as Sam continued to spray her ejaculate over the surrounding furniture.
James looked to his mother's cock, breathing a sigh of relief that she hadn't experienced her own orgasm yet. This relief was short-lived as he looked up into his horny mother's eyes. "Me still horny James. Me like you boobs. You help mommy, yes?" Before James could protest, his mother enveloped him in a kiss and began grinding her rock-hard equipment against his breasts. The grinding continued relentlessly as Margaret's moans deepened. James could feel his mother was getting close as he struggled to get loose, the cock and balls in the woman's jeans pulsating more readily.
Eventually, James felt a wetness on his chest. This was followed by a gush of liquid as Margaret, experiencing her second male orgasm, roared and came all over her son. James could only watch as his mother, eyes rolled back, shuddered as she expelled a massive load of her cum.
Quiet settled on the room, both women recovering from their male orgasms. The silence was broken as James saw traces of intelligence return to his mother's eyes.
"Oh James, I am so sorry."
James and Margaret got up as they moved to inspect their changes.