Like other times, I went home with Susan to do our home work together. School finishes at 2pm and mom and dad don't get home till after 5. We were having a drink and saw my brother cuming up the from school. Both Susan ans I are 14 years old and my brother is two years older. It was my idea to play a joke in him, so we both hid in his closet. He must have thought that he was alone in the house and I hadn't come home yet. We left the sliding door half opened and looking out threw his clothes. We were waiting for him to go come over and scare the living shit out of him. We saw him walk by a couple of times an then went to the bathroom. We din't expect he was going to come out without his pants on. He was going to be very embarrassed if he knew we were dare, so we dicided to stay so he wouldn't notice. We were shocked when we saw him taking off the rest of his clothes. He was going to get really mad if he found out were in there looking at him buck naked. We were hoping he was just changing his clothes, but then laid on his bed and began playing with himself. We just stood there watching him stroke his dick and getting bigger and bigger. It was the first time for both of us, to see a boy masturbating his hard dick. He had his legs apread and hand rapped around his penus, giving us a perfect view of his whole crotch. His balls were tight and the head of his dick looked swelled. The pleasure was making him moan and a short time after, he came all over himself. Squirt after squirt came out and landed clear up to his niples. He layed there for a few minutes and then went into the bathroom. We got so horny and hot, I think both our pussies were dripping wet. It was our chance to sneak out unnoticed as we heard the shower curtain pulled back and the water turned on. We quietly sneaked out and he never knew we saw the whole thing. We both got so aroused, we latter confessed that we masturbated ourselves off that night just fantasysing about his dick.