When I was 4 I started to "secretly" wear my baby brother´s Pampers, which fit properly until I was 7 or 8; I mostly wore them at night for sleeping but sometimes I felt more daring and wore them briefly for daytime as well... one time when I was 7 there was a family gathering at my aunt´s house and I playfully told one of my cousins, who´s a year younger than me, that I liked wearing my brother´s diapers, so he challenged me to take one from the diaper bag and wear it in front of him. I felt seriously compelled to prove something to him so I accepted the challenge.
The first difficulty that I though of was how to access the diaper bag unnoticed, until my cousin showed me the diaper bag resting happily unattended upstairs, on his mom´s bed, next to my sleeping brother. As silently as I could, I extracted one of the 7 diapers that patiently waited for their turn to save the day, cursing at the crinkling which sounded seemingly louder in that quiet room.
Having got the diaper, the next step in the challenge was to wear it, so we rushed back to my cousin´s room, where I dropped my pants and undies to my ankles, set the diaper on the bed, hopped on top of it and proceeded to adjust the tapes while my cousin looked completely astonished. "I learned to diaper myself before I even learnt how to tie my shoe laces, can you believe it?" I asked him as I adjusted my undies carefully on top of my diaper. - "And have you ever been caught?" - was his next question. "A couple times" - I responded as I pulled my jeans back on an adjusted my shirt around my hips to cover my diapered butt. "Do you have to pee?" he asked me then. - "I don´t think so, but maybe if I get some coke..." - "Wait here, I´ll get it for you!" - and he dashed out the door.
A few minutes later, my cousin came back holding 2 glasses of coke. He gave me mine and told me to drink it all at once so I had to pee sooner. Luckily we didn´t have to wait much as I felt a slight urge to pee as I was taking the first sip of coke. I happily informed that I had to pee and immediately started to let go in my diaper. My cousin then started to laugh histerically, drawing his mom´s attention, who started climbing up the stairs asking what we were up to. "He farted loudly" - he said pointing at me. - "Ew! I don´t want to know that! You should do that in the bathroom anyway!" - And she left with a disgusted face.
My cousin´s curiosity was too much, so he kept asking me if I needed to pee and poking my diaper all afternoon. I happily let him know about two more pees before letting them rush into my diaper. Just when I though It´d be a good idea to change, my mom came upstairs to pick up my still-sleeping brother and instructed me to say my goodbyes. I tried to stall but she told me to hurry up in her classic severe tone, which actually made me dribble a bit. Knowing I would have to try my best to get home with my diaper unnoticed, I said very shy goodbyes to my family and rushed into my father´s car. Once in my seat, I started planning how to take the diaper off without getting caught. I resolved that I´d go behind my mom while my dad parked the car, take the diaper off in my room and throw it in the diaper bin. I was so happy about my plan that I peed myself once again, thinking nobody would ever know.
I was in the middle of my peepee bliss, when I suddenly felt a warmer feeling down my lower inner thigh, which I already knew that indicated a leak and cursed at myself for not keeping the diaper´s capacity in mind... but there was nothing I could do until my bladder was empty. I lifted my butt and reached down to assess the situation and felt a wet spot on the seat which didn´t seem too large. I relaxed. When we got home, as I had forecasted, my mom started unbuckling the baby form his chair, so I opened my door and hopped out of the car. I hadn´t closed the door when I heard my mom yell "What did you spill on the seat now? Did you piss yourself?" I turned and looked in horror that I had left a wet spot the size of my tushie on my dad´s seat. Suddenly I realized how wet the back of my pants felt. My mom lifted my brother from his seat and walked towards me. I tried to lean my back against the car to hide it, but my mom grabbed me by my arm and turned me around to reveal my very wet behind; my soaked diaper obviously sticking out revealing its presence to the world.
"Is that a...? When did you...? How did you...? How many times have I told you...? In front of your cousin? Why would you even consider...? Everybody was downstairs! Just go to your room and take it off. I´ll deal with you after your brother... apparently I still have to take care of two babies here!".
I started walking towards my room as if I was walkig down the death row. My dad walked past me and told me that instead of telling me a bedtime story, he´d have to wash his car, making me feel even worse. My mom called me from the bathroom and instructed me to take a shower immediately whilst she installed my brother´s baby bath. I started to strip very slowly; she lost her patience and started to undress me herself until I only had my diaper on. She violently ripped the tapes open and pulled the diaper from between my legs; she then grabbed a wipe and proceeded to clean my entire diaper area very lovingly but in complete silence. When she was done, she gave me a hug, patted my tushie and told me that I was too old to be wearing diapers and asked me to leave my brother´s diapers alone for the millionth time.
After my shower, my mom helped me into my pjs as always, fixed my chockie milk for the evening and helped me brush my teeth before tucking me in bed. After kissing me good night, she tipped my nose with her finger and said "Remember that you´re my brave little knight and I´m very proud of you, my big boy". I was still feeling super ashamed so I just nodded. For a brief moment I thought I never wanted to wear another diaper ever in my life... but after a few minutes, I concluded that I only needed to be more careful next time.
I was in an oversized crib but the sides were left down given my age.
she agreed and said it was a dare. 
