Since they got together, Sarah had been using Alex's orgasms as a tool to train him. From the outset of their relationship, she had made it clear that Alex would never be allowed to cum inside of her, but now she doesn't let him cum at all outside of his diaper. Sarah knew that this would have a profound psychological effect on Alex, and she hoped that by making him orgasm in his dirty diapers, he would associate the act of using his diapers with pleasure.
Sarah smiled at him as she set the vibrator on the bed. She then held open the waistband of the plastic pants for Alex. Gingerly, he climbed into them. He lifted each leg carefully to avoid any leaks. Once he had both legs in, Sarah swiftly pulled them up and locked them.
Alex sighed. Now he would be stuck in his dirty diaper for as long as Sarah desired, but it was well worth the reward. After all, it had been several days since his last orgasm. Sarah tells him that he could be cumming more often if he stopped holding in his messes.
Sarah sat on the edge of the bed and patted her lap, signaling it was time. Alex waddled over to her and sat down on her lap. He cringed as her knee smashed into his butt, spreading his mess further. Sarah picked up the vibrator with one hand while the other held Alex firmly in place.
"You ready, sweetie?" Sarah asked.
Alex nodded. Sarah pressed the vibrator firmly into the front of his diaper. She moved it around until it rested directly on his penis, then turned it on.
Alex moaned as the vibrations sent shockwaves through his body. His back arched as Sarah pleasured him. Her firm grip was all that prevented him from falling.
"Haah... Uugh... Aaah..." Alex moaned.
"That's a good boy! You're a good boy for going potty in your diaper! Yes, you are! Good boys get to make cummies when they make stinkies for Mommy!"
Alex was overwhelmed by all of the sensations he was experiencing. The powerful vibrations on his diaper, Sarah's breath on his ear as she praised him, and the smell of his mess.
Just as Alex had settled into a rhythm, Sarah began bouncing him up and down with her knee. The bouncing served two purposes, first was to heighten the pleasure that Alex was experiencing, and second was to squish and spread his poopy mess all around the inside of his diaper.
As Alex felt his mess squishing and spreading, he approached the point of no return. He started involuntarily thrusting his hips in concert with Sarah's knee bounces. His plastic panties crinkled as Alex moved his hips. Before long, he was panting heavily and on the verge of orgasm.
"That's it, baby! Make stickies for Mommy. Spurt into your diaper!"
Sarah always said, "Little boys cum in their diapers so I can throw their sperm in the trash where it belongs." Alex knew that he would never have the honor of ejaculating inside of Sarah. He would never be able to get her pregnant or pleasure her with his penis. Instead, he had to orgasm while sitting in his own excrement, only to watch her throw his precious seed straight into the garbage.
On a primal level, this was infuriating to Alex. Men are supposed to lead and provide. What kind of man was he if he couldn't even pleasure his partner? The truth that Sarah helped him accept is that he is not a man. He is a little boy who craves her love, care, attention, and guidance. Sarah is the one who gives him pleasure. It is her that wipes his ass and changes his poopy diapers. Sarah is his world, and he wouldn't give her up for anything.
Alex's face scrunched up as he erupted into a violent orgasm. Relief washed over him as he shot his pent-up seed into his diaper. Sarah turned off the vibrator as Alex slumped against her, exhausted. She ran her fingers through his hair, comforting him as he recovered from his orgasm.
"Thank you, Mommy," Alex mumbled between heavy breaths.
"For what, sweetie?"
"Thank you for taking care of me."
"You're welcome, sweetie. I love you."
"I love you too, Mommy."
