When I was a kid I shared a room with my brother, he was the sporty type and for as long as I remember a ladies man, mum encouraged that kind of behaviour from him. 

We had to share a bed as the house we lived in was small and the bedroom only had room for one bed, one night my brother woke me and pointed out the window, across the alley at the back of our house we could see into another bedroom a young woman was getting undressed, she pulled off her top and revealed the most amazing set of breasts large and round, a firm belly and then her pubic area with a full head of hair, as we lay there carefully not to show we were there we watched as she brushed her hair and then pulled on her nightshirt.

 This continued for several nights until one night something different occured, she wasn't alone a man was with her and fondled her breasts and pulled her around into a deep embrace and snogged her, he pressed her up against the window her back against the glass as he worked his way down into her mound and buried his face there, he did this for a while and we could only watch both of us were erect our cocks straining at the sight, he stood up and then slowly pushed her down onto her knees before him and she took his cock into her hands and then from side on to us she slowly started to suck his cock taking his head into her mouth and then moving her mouth and hands along its shaft.

Watching this was too much, my brother had pulled his cock out and started to stroke it masturbating to the sight of this young woman and this man, I shyly pulled my cock out as well and began rubbing it as well, my brother had moved to the side of the window now so that he could watch and wank at the same time almost mirroring what was going on across the alley, he stopped and looked at me "crawl over here and do that" he ordered I slowly slithered across the room careful not to be seen and lay before my brothers cock I took it inot my hand and began to rub his length feeling it throb and respond to my touch, I then brought my lips to his head and kissed it and licked it tasting the soapy residue from his bath, I opened my mouth and took him into my mouth slowly trying to copy what the woman was doing, my brother had the better view so I gave up and just sucked and stroked his cock instead feeling him starting to thrust and grunt as he held my head his hips moving back and forth as his cock brushed against my tongue and teeth. 

 A noise from mum and dads room stopped us and we both dived under the blankets after a few minutes when the sound of movement stopped my brother pushed me down his torso and between his legs were I sucked his cock again, he lay there with my head bobbing up and down under the quilt all the while he tried not to make too much noise, eventually he came his cock began pumping and pulsing and my mouth was splattered by his warm salty cum - that was his first orgasm and it had been in my mouth I had nothing to dispose of it so I swallowed it feeling it coat my teeth my own precum dribbling from my own cock.