Keep it secret

You had spent the last few days in genuine terror that your mom would discover your crusty sheets, and their roughness made you regret not telling her. There was no way to clean them without revealing the truth, so every night you slid into bed and had to deal with your shame. Nothing about your routine had changed otherwise. Your mom had been taking careful measurements every morning and before bed each night, consisting of soft and hard shaft lengths and the "weight to tightness ratio" she had designed. The data served to test her belief in boosted testosterone and size through limited ejaculation, as well as keeping tabs on how soon before you needed a supervised release to keep you in the optimum range, noted by her ratio: "light and tight" meaning you were low risk, "plump and loose" meaning a perfect time to get data on treatment efficacy, but since your wet dream you had yet to hit her targets, probably due to the overwhelming anxiety you were feeling. She was convinced that your nerves about the game was the reason for your shortcomings this week, and she cleared you to play that night without any treatment necessary other than your special jockstrap.

The day passed pretty uneventfully, besides the kiss Ross snuck you after the Pep Rally, and in no time at all you found yourself in your mom's athletic trainer's office waiting on her to show up. She had only started working at the school after the team physicals, but she had certainly fit into her new job quite well. Coach Hester raved about her and the whole team had a great deal of respect for her. You were afraid that the guys would be teasing you, but your fellow Super Seniors had pretty much put a stop to that, even after the teasing the day of the physicals. The old PT had been kind of a grumpy old lady, so your mom had been like a ray of sunshine. The whole team seemed to be playing harder, because even if they got hurt it meant that your mom would be there to treat them!

"Oh, hi sweetie! I'm glad you remembered to come by, I thought you might get too excited about the game tonight and run off with the boys to goof around." You waved her off as she gave you a hug. "Now, your in the optimum range for playing tonight, so we don't have anything exciting to do, but I've got to make sure that your new cup fits well. It's something I had made for you to keep you safe during games, and I think it's the best way for us to make sure no more damage occurs to your penis. If we want to turn this condition around we've got to keep that little guy safe!"

She then directed you to strip and get up on her physical therapy table on all fours with your legs spread a bit apart. You were pretty familiar with her examining you at this point, but you didn't really think she would have to make you display yourself just to see if a cup fit you. She pulled some latex gloves on just like she had during your physical, but this time she also pulled out a bottle of lube as she positioned herself beside the table in line with your hips.

"Okay Chris, I know you may find this odd, but think of me as just a medical professional fitting you with a device, not as your mother. Believe me when I say that you're in good hands, and that I won't judge you for any sounds or movements you make, I would just ask you to try not to get an erection, as this cup is designed to keep you packed neatly away."

"Yes mom" was about all you could utter as your situation set it. It almost made you laugh, but the feel of your mother's hands on your body made you moan instead. She presented what looked like a pretty normal football cup and what you recognized as a heavily modified chastity cage from your time on the internet. Seeing the concern in your eyes, she quickly explained that it had been custom built to pair with your cup and serve as super protection against injury while you played. The cage was like a whole sleeve designed to encompass your package, and your mom explained that being "light and tight" was really the only way to fit in.

"Now, normally we would have to work to get this on you, but given my measurements from this past week I feel like it will slip right on, no problem! If you're ever in the "plump and loose" phase I'll have to administer a release to get you suited up for the game."

Your mom easily fit the ring around your cock and balls before she locked the cage in place with a push pin and pulled the black sheath modification over your testicles, keeping everything in one neat little package that slotted in perfectly to your new cup and jockstrap.

"Now, this is not a permanent cage nor one with a key, so you don't need to worry about removing it in the locker room after the game. If you do it right, there's a way to take the whole thing off in one inconspicuous latch press, so none of the boys will notice anything's out of the ordinary while you're getting dressed, just like how I showed you how to get away with wearing panties too. Tell me, how does it feel to wear?"

It honestly felt like nothing at all and you told your mom as much by demonstrating a few lunges and squat jumps, to her delight!

"Excellent! I knew the measurements were spot on! Let me go ahead and wrap your ankles so you can get your game pants on and head over for the team meal. I have to clean up in here then take care of the other guys after the meal so I'll see you at game time."