I share an apartment with my brother. When he masturbates in front of me, he does it without taking his clothes off. He wears a tee shirt and spandex shorts. Spandex is tight material, so I can see the shape of his cock and balls. Yesterday he masturbated. He caressed his cock through his spandex shorts. His cock got erect. I could see the spandex stretching. He stroked his cock and moaned "ohhhhhh, ssssssss." He told me how horny he was. He kept moaning "ohhhhh yeah, ssssss." When he got close to orgasm, his moaning got louder and more desperate, and he said "my cock milk is coming, oooooohhhh my milk is coming." Then he screamed and said "drink my milk." Then he squirted out his cock milk. The crotch area of his spandex shorts got wet. He kept stroking his cock until all his cum was out. He squirted out a lot of cum. When he showered, I secretly smelled his cum. I picked up his spandex shorts and smelled the crotch area. My brother masturbates a lot.