"Let's get this onesie off along with the diaper."

I laid on my tummy and let mommy do her job as she unbuttoned and removed my onesie. I turned my head on the side and stared at Izzie's legs. She was so god-damn gorgeous and so cruel! I could not believe she betrayed me! She sat there with some books in her hand, waiting for her turn - I guess.

"Before I give it over to Izzie, I will spank you for kicking me earlier." Mom said with a weird voice. Her tone was cold, calculating but also kind and nurturing. I did not have time to move - and was too tired to move - so I just laid there as mom hit me on my butt cheeks again and again. I was numb from the testicle slap earlier, so it took some time before the spanking was hard to ignore.

"Oh my god, is that the lube coming out of his butt?" Izzie shouted. As mom repeatedly hit my cheeks, I let a few farts out, followed by a mushy, thick, transparent liquid.

"Oh, yes, it is working. Now it is your turn, Izzie." Mom announced and moved aside, letting Isabella sit between us. I stayed on my belly.

"Do you remember the biology class when we learned about genitals and periods, Bel?" Izzie asked. I vaguely recalled the class a few months ago. I never cared for biology, so I couldn't recollect much.

"You made fun of female anatomy. You giggled while we talked about periods. You were a very toxic man... sorry... boy there." Izzie explained as she placed and opened one of her books in front of me. "Now, I am asking you to read from this book."

The book was some sort of dissertation on periods.

"You... you want me to read this?" I asked hesitantly.

"Yes. Please do. If you make a mistake or act as you acted in biology class, I let you know." Izzie's words had so many veiled threats I did not even try to comprehend them.

"...The reproductive system of a female, unlike men, shows regular cyclic changes that tele..." I started reading and already got stuck on a word. I did not have time to correct myself - mom's hand descended and slapped me on my butt.

I took a deep breath and continued. "...Preparation for pregnancy and fertilization. In primates..." another mistake, but this time they did not slap me. Instead, mom inserted a small object inside my rectum.

"We talked about how backed-up you are, darling." Mom explained. "So we will give you some glycerine suppositories to unclog you. Baby needs to do some doo-doo. Haha. You will get one for every mistake you made."

"What? That is insane!" I resisted, but mom slapped me on my ass. She leaned in and placed her hand on my back, so I could not get up.

"Keep reading... little sissy." Izzie hissed at me with hatred.

"...with the shedding of uterine mucosa..."

"...It begins at puberty, ranging from the ages of 10 to 16, and ends at menopause..."

"... the cycle is the follicular or proliferative phase...."

Initially, I only made mistakes with scientific expressions. As mom kept pushing the suppositories in, I sweated like a horse, and I started slurring simple words. A few failings later, mom handed the suppositories to Izzie, who inserted them like I would be a slot machine. By the end, they weren't even listening to my mistakes; they were just systematically filling up my butt with medication.

"That was it. All 20 of the suppositories." Mom concluded. She diapered me again and dressed me up into the onesie. However, the medicine was brutally potent, so my adrenaline kicked in, and I rocketed towards the toilet. Izzie couldn't stop me. Mom couldn't stop me.

Unfortunately, the medicine could stop me. I barely made my second step forward when my guts released everything. I filled my diaper with mushy poop. There was so much excrement the elastics broke and opened up. The poop rolled down my legs, pushing its way through its fabric.

They devastated me; humiliated me beyond belief. I faced mom and Izzie and broke down crying.