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Author's Note: "Playing With My Sister" is a bisexual series. This chapter contains male-on-male sex scenes. If this bothers you, please go read something else, rather than sending me nasty anonymous emails.
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"You've already met my OTHER lovers," Suzie said. Kristen and Al were staring at us, wide-eyed and speechless.
Angela was tall and solid, the only true athlete in our family. She had thick black hair cascading down her back, her breasts were big and heavy, with swollen brown areolas and long pink nipples, and her ragged purple pussy lips peeked from her thick black pubic thatch.
I had Angela's light olive skin and Mediterranean features, but was average-looking, rather than beautiful. I was a little taller and heavier, with short black hair. The stiff pole protruding from my light dusting of black pubic hair was 6" long and 1-3/4" thick, matching Al's monster in length, although not girth. I was one of the biggest boys in the school locker room.
"Paul and I came with Suzie and hid in the second bedroom," Angela said. "We're really hot from watching you!" Her dark curls gleamed with beaded juices and her sharp woman scent filled the air.
"Al almost caught us," Angela continued as she approached the bed. "We were in the hall and Kristen was screaming so loudly we didn't hear him come in. We ducked into the bathroom at the last second."
Suzie and Kristen moved aside as Angela pushed Al's legs open and knelt between his thighs. His cock stiffened as Angela bent over it. "Birthday Boy has a nice big candle," she purred, "and we're all going to blow it!"
As the rest of us stared, Angela wrapped her hand around Al's swollen shaft and licked his wide cock-head, probing his cum-slit with her tongue. She pulled away for a few seconds, letting us see the fluid leaking from his tip and running down his shaft to his balls, before taking him deep in her throat.
"Oh Angela!" Al moaned, squirming as her head bobbed over his crotch. "I saw you watching me at Mom's birthday party. You're even better than I imagined!"
"Yeah, Baby!" Angela said, fondling Al's hairless balls while stroking his shaft and running a finger over his glans, smearing the pre-cum leaking from his tip. "I knew what you were thinking, too. My panties were SO wet! I've been dreaming about this!"
Angela bent forward, trapping his cock between her big firm breasts. "Come on, Birthday Boy!" she said. Her fingers were interlaced over her cleavage, pressing her flesh against Al's pre-cum-slick rod. "Fuck my tits!"
"Jesus! This is so hot!" Al gasped as he drove his throbbing prick between Angela's big tight mounds. "I'm going to . . . Oh!" His body jerked violently as he sprayed hot cream in her cleavage.
"That's a lot of cum!" Angela exclaimed, looking at the sticky fluid covering her chest.
"My girlfriend Valerie is taking care of a sick aunt in New Mexico," Al said. "I haven't had sex in a week."
"It shows!" Angela laughed, gently caressing his still-stiff pole. "You ARE Alexander the Great! What a wonderful sword . . ."
"Don't be greedy!" Kristen chided, pulling Angela away from Al. Standing inches apart, the women stared into each other's eyes for long seconds, then started kissing passionately, rubbing breasts and grinding crotches.
"Kristen forfeits her turn!" Suzie announced, straddling Al's hips and bending forward to kiss him. "She's had you before, anyway!"
"Sexy little sister!" Al cried, twisting to position his hard dick at her pussy mouth.
"No! No! No!" Suzie said teasingly, squirming away and wrapping her hand around his stiff pole. "You've already fucked me. Now, I'm going to play with your toy! You just relax and enjoy it!" Her nipples, hard little pink domes in the center of her puffy dark pink areolas, grew even longer as Suzie rubbed Al's cock-head against them.
Kristen and Angela were still locked in a passionate embrace. I moved behind Kristen and pressed my erection between her buttocks. She pushed back and I wondered if my pre-cum would provide enough lubrication to enter her asshole.
Kristen laughed and twisted away. "This IS Al's birthday," she said. "I guess we should pay attention to HIM!"
"I'm doing all right!" Al gasped. Suzie's left thumb and index finger circled his base while her remaining fingers kneaded his bulging balls. Her right index finger was locked against his corneal ring and her thumb stroked his glans, smearing the fluid leaking from his tip down over his super-sensitive Vee, keeping him writhing in pleasure.
"Jesus!" Al cried. "Suzie-Q, I've been fantasizing about taking you to bed since you reached puberty. Sleeping with Kristen makes me think that way. I imagined I'd have to teach you everything."
"So teach me, Big Brother! Am I doing THIS right?" Suzie asked, stroking his shaft and increasing the finger pressure on his swollen cock-head.
"Oh God, Suzie-Q!" Al cried. "I'm going to . . ."
Suzie wrapped her mouth around his throbbing tool, sucking frantically as Al thrashed on the bed. When he was finally still, Suzie lifted her face from his crotch and kissed me. The strong taste of Al's semen on her lips made my hard-on grow even bigger.
"My turn!" Kristen announced, taking Suzie's place kneeling between their big brother's legs. "Al DID teach me everything! I was so selfish at first! I'd cum while he ate me, but I wouldn't go down on him. It was a long time before I discovered how good sucking a cock feels!"
"Yeah, Baby!" Al agreed, pulling Kristen down onto his chest. "You learned!" They kissed passionately.
Al's penis had softened after squirting in Suzie's mouth. "Sweet little tired pecker!" Kristen said, moving back between Al's legs, taking his limp tool in her hands and kissing its broad tip. "Did my little slut sister wear him out completely?"
She leaned forward, sweeping her heavy breasts and hard nipples over Al's crotch. "I guess not!" she giggled as he responded to the stimulation.
"I love your big sexy balls," Kristen purred, "filled with cum! I hated the condoms because I wanted to feel you shooting deep inside me! I wasted 16 months working up the nerve to get on the pill!"
Al's semi-erect dick hardened as Kristen licked the sensitive area between his testicles and anus, eventually moving up to suck his balls, one at a time and finally together. "Yeah, Kris!" he gasped as she licked up his shaft and probed his cum-slit with her tongue.
"Oh fuck!" Al cried, working his hips as Kristen's mouth bobbed over his swollen rod. At the last instant, she pulled her face away. Angela, Suzie and I stared as Kristen jacked Al's throbbing tool, squeezing his balls as she stroked his shaft and ran rough fingers over his pre-cum-slick head.