Margaret watched her son go, a look of concern on her face. Eventually, she turned back to her cleaning. A few seconds later, however, a sharp shock went through Margaret's body. The older woman's eyes went wide at the surprise. The feeling immediately faded, leaving Margaret to blink a couple times and adjust her glasses. The woman contemplated going to James about the odd feeling, but passed it off and went back to her cleaning.
As Margaret continued to clean, her thoughts slowly began to turn sexual in nature. The mother began to reflect on her sex life and the last time she had gotten it from her husband. The mother's thoughts turned more perverse in nature, however, changing to fantasies of being bent over and drilled by a masculine handsome stud. She shuddered as she felt a wetness in her panties and jeans. "Mm, I need some cock," the woman mumbled.
"What was that mom?" Sam asked quizzically.
"Oh nothing dear." Margaret recovered, blushing profusely. The woman continued cleaning, surprised at her lustful thoughts. Before long, however, the thoughts returned, except with a twist. This time Margaret was the handsome stud drilling an absolute bombshell of a woman. As she let the fantasies consume her thoughts, the bombshell became her daughter. Margaret ogled her daughter across the room. "I wonder how good she is at sucking cock. What! No, that's my daughter what am I thinking?"
Margaret shook her head before settling back into cleaning. While she was successful at driving away some of the lustful thoughts, Margaret's gaze constantly returned to her daughter. The mother gazed lustfully at her daughter's subtle curves, licking her lips as she contemplated all sorts of taboo activities. As she continued to gaze, Margaret also began to notice an odd tightness in her jeans. The mother's scientific mind was able to reassert itself as she heard the water from the bathroom turnoff. "Why am I so horny?" she thought to herself.
"Are you feeling okay Sam?" Margaret asked.
"Yeah, are you not? James did ask us to let him know if we feel weird at all."
"No, I feel fine. It's just a little warm in here I guess" Margaret hastily lied, not wanting to startle her daughter.
Margaret began fanning herself, hoping to drive away some of her horniness. As she did so, the mother also shifted uncomfortably, as her jeans had begun to become mildly uncomfortable. A tingling feeling also arose as Margaret began to itch at her nether areas. Eventually, the mother found a comfortable stance that alleviated some of the tightness. It was at this point that James re-entered the room.
James sat down next to his sister, feeling rejuvenated now that all of Linda and Carla's cum had been washed off of him. He began to start his tale of what had transpired earlier in the day before he caught his mother's gaze. Margaret was staring intently at her son's chest. James initially passed his mother's interest off as shock at seeing the buds on her son's chest. An inspection of his mother's lower body revealed the true source of the fascination. "Oh no, mom!" James cried.
A long bulge could be seen snaking down Margaret's pant leg. As James watched, he could see the appendage shudder every so often, in tune with his mother's heart rate.
"James, what's going on? What's wrong with mom?" Sam asked before turning her own attention to her mother. Sam's face went white seeing her mother. "Oh my god mom! What happened to you?"
Margaret, lust now forgotten, looked down at her changed body. "WHAT'S HAPPENING TO ME!" the mother could only cry. "James is this what you meant earlier. How do we reverse this?"
James tried to settle his mother down, knowing that panic could encourage the changes. He was interrupted by a cry from Sam.
"Mom, something's happening to your crotch!"
Margaret looked at her children with panic before exclaiming, "I think I'm growing balls." The siblings watched as the previously flat crotch area of their mother's jeans began to bulge out. Margaret's eyes rolled up and her face went red as she involuntarily began pushing the bulge outward. Heavy panting could be heard from the mother as a pronounced package of testicles proudly rounded out the crotch of her jeans. As the testicles finished growing in, a wet spot could be seen forming at the end of the penis in Margaret's jeans.
James and Sam urged their mother to fight the changes, but it was clear she was losing the battle. "James, Sam, I so horny. Please help mommy. Need relief. Need..." Margaret dully mumbled at her children. James and Sam were taken aback at the change in their mother's tone. Gone was the analytical science professor. As a goofy smile crossed the mother's face, Margaret's hands fell to her jeans as she began to slowly rub her throbbing cock and balls.
James, seeing his mother giving in to her changes, began to move towards her to prevent the impending orgasm. He was too late however, as the goofy smile on his mother's face quickly changed to a look of shock and surprise. "James, Sam, what's happening to me. Help me!" was all Margaret could beg of her children before her lust overwhelmed her. The mother's cock began spraying cum like a firehose through the leg of her jeans. The crotch of the jeans pulsated as Margaret's new balls fed the appendage with new fluid to expel. Margaret, meanwhile, could only thrust at the air and shake, as she forced ejaculate out of her new genitals onto the clean floor.
Eventually, Margaret with a dazed look, sunk to her knees in the pool of cum. James and Sam ran to help their mother. There were still more changes to occur.