"So what's with the shorts you were folding on the deck?"
Jackie asked cuddling against Alex's side in the after glow of several body shaking orgasms.
Her hand idly stroked his flaccid dick that glistened with the remnants of his own cum and juices from both Jackie and his sister. Gwen casually traced a circle around one of his nipples with a fingertip. Jackie wiggled closer to him and Alex brushed his hands over both their asses, drawing them closer until their knees met with their dripping pussies leaking his own jism on to the top of his thighs.
"They're for the snorkelers,"
he laughed, slowly dragging a finger up through Jackie's ass cheeks, causing her to shiver and tighten her hand on his dick.
"Even with a good all over tan, spending a few hours in the water with your ass in the air can lead to some pretty severe...and really, really unpleasant...sunburn, so everyone wears them when we go out."
Jackie quivered again as Alex swirled a fingertip around her puckered asshole. Her low moan and quickening strokes of his stiffening cock told him she didn't mind that at all.
"I can see your point,"
she moaned lowly before licking his earlobe,
"there are much better ways I'd rather get my ass reddened and stinging."
"You don't say?"
Gwen chimed in from her brother's other side.
She reached across Alex's chest and tweaked Jackie's left nipple, pinching her hard before giving it a firm tug. Jackie groaned even louder before flicking her tongue into Alex's ear and squeezing his balls hard enough he yelped. When he turned to face her, she rammed her tongue into his mouth and pushed her hips back against the fingertip pressing against her asshole.
"Fuck yeah...much better ways!"
Jackie murmured, taking her hand from Alex's balls and pulled Gwen across his body to her.
Gwen didn't hesitate, crawling over her brother's chest to kiss Jackie passionately. Their bodies entwined, rolling off Alex as their fingers found each others dripping pussies. Alex wiggled around to watch them for a moment then gave Gwen a sharp slap on her ass.
"Get on your back, sis,"
he commanded and got up on his knees,
"with Jackie on top and lick each others cunts."
The girls shuffled around until their faces was buried in each others pussies. Jackie wiggled her ass suggestively just before she felt Alex spread her cheeks with both hands. A moment later, his tongue flicked around her puckered asshole, sending yet another shiver through her entire body as he squeezed her ass cheeks tightly.
Alex rimmed Jackie's asshole for a few minutes, while Gwen eagerly sucked her clit and fingered her drooling cleft. Jackie thirstily lapped up the sweet and tangy juices seeping from Gwen's cunt. Then Alex pulled back and Jackie felt a gob of spittle ooze over her anus, followed by a finger stretching her tight sphincter. She groaned and pulled Gwen's clit between her teeth.
SLAP!
Jackie's back arched and her head flew backwards as Alex swatted her right ass cheek. She looked back over her shoulder and grinned her approval.
SLAP!
He spanked her left ass cheek a bit harder than the first, the sting and warm tingle going straight to her pussy. She didn't need to look to know there were two reddening hand prints on her ass. Then Alex rubbed his rigid dick up through her dripping slit, lubricating his cock head with her own juices.
SLAP!
"Oh god...YES,"
Jackie cried out and buried her face between Gwen's legs.
SLAP!
"FUCK ME...FUCK...ME...HARD...NOW!"
SLAP!
Alex's cock rammed deep into her throbbing pussy, thrusting hard a few times as his thumb penetrated her asshole.
SLAP!
He slowly pulled out of her cunt, the tip of his cock pressing against her asshole.
SLAP!
"YES...GOD YES...FUCK...MY...ASS!"
SLAP!
Her asshole resisted his stiff dick for just a heartbeat before stretching open and he slowly slipped into her.
SLAP!
SLAP!
SLAP!
Her first orgasm peaked and blended right into the even stronger next one as Alex's dick rammed as deep as he could go into her bowels. She screamed and flooded Gwen's face and mouth with her orgasmic fluids.
SLAP!
"MORE...HARDER...FUCK...YES...FUCK...MORE!" Jackie screeched as she felt Alex's warm cum gushing into her.
SLAP!
Alex pumped her hard and deep, fast and hard as his sperm flooded into her, each thrust followed by a stinging swat on her now blazing butt. At last his dick deflated and slipped out of Jackie's asshole, followed by a river of his cum splashing across his sister's face.
Alex rolled off Jackie's back when his dick finally pulled completely out of her ass. She collapsed on top of Gwen, breathing heavily as she inhaled the sweet aroma of Gwen's dripping pussy. For a few moments, Gwen eagerly lapped up the combined cum and pussy juices oozing from Jackie's ass and cunt. Then she pushed Jackie on to her back and raised herself on one elbow.
"You aren't done yet, brother, my pussy needs some of your special attention too,"
Gwen cooed before falling back and pulling her legs up from behind her knees to spread her thighs as far as she could manage.
Her small clit popped out from under its hood and her pussy lips gaped wide, the pink moist flesh glistening in the dim light of the boat's cabin. Alex got back on his knees next to his sister, his flaccid dick practically resting on her lips, one hand tightly grasping one of her tits and the other rested down between her legs.
"Oh yes, brother...you know what I want...what I need,"