Cumming Hard

It was the sumer time thing where good , school was out and i was out most days .
I was twelve i think the year passed so fast , i was out riding my bike with my friends round the village most of the time .i was having trouble getting comfortable every time i went over a bump in the road my dick got bigger pulling my pubes out this was very strange, in the past it had got big but this was massive my pants were too small.
A little later it went down but my pants are wet and sticky, i got home had my tea and watched some tv it was bed time and me and my older brother shared.
I got in to bed and the swelling started again ,i gave it a rub how odd it felt nice to rub my now massive cock it gave me a rippel of pleasure right through my body .
Again I took hold of my cock up and down i could not stop myself i began to moan louder and louder by now a stream off per cum was running on my hand ,and then it happened i came for the first time.
It was the nicest thing that ever happened to me , my cock was pumping what seemed at the time like a pint all over my belly and i just couldn't stop moaning so loud when my body had finished with me i heard a voice from the other side of the room are you ok it was my brother i had totally forgotten about him been there .
The rest of my holiday i spent pulling myself silly ,but you never forget the first time