WARNING: This story contains straight sex, bi sex and family sex. All over 18 and all consensual.
Marie came close to panic when she saw Mom and Aunt Katie standing in the doorway of the boys' basement bedroom. She still had Darren's cock stuffed up her ass and her tits and face were streaked with thick ropes of the twins' and her cousins' cum, all of it still warm from its recent energetic expulsion from their respective cocks. She sat up quickly, searching the bed for anything to cover herself with, but of course the bed wouldn't be made. Typical brother housekeeping.
Jesus, I am in a heap of shit now! Why the fuck aren't the boys trying to hide their cocks? Why isn't Darren trying to get his huge beautiful cock out of my asshole? Why are Mom and Aunt Katie smiling like that?
"Nice to see you boys finally including your sister," Mom said and Marie's mouth dropped open.
* * *
Twenty minutes later she was in the shower, but not the shower she usually used across the hall from her room, the one she shared with her three slob brothers, but Mom and Dad's shower in the master suite.
There wasn't much cum to wash off of her body anymore, because Mom and Aunt Katie had taken care of most of it. They'd smiled warmly approaching the bed in the basement as Darren had slowly extracted his cock, and helped her to her feet. Mom had hushed her plea to retrieve her clothes from the laundry room, and Marie had made the trip up two flights of stairs through the house to the second floor worried that Dad would come home and see her naked and covered with her brothers' and cousins' cum.
When they'd finally made it to her parents' bedroom, Marie had been further shocked to see Mom and Aunt Katie take off their clothes, revealing bodies that were very much like Marie's own: big tits, big asses, and thick thighs. Then she'd sucked in her breath and gasped when Mom started to slowly lick the cum off of Marie's tits and Aunt Katie had immediately joined her.
They'd slowly guided her back to the bed where Marie allowed them to lay her down. Both older women got onto the bed with her and made an elaborate feast of their sons' cum from Marie's body while Marie squirmed and writhed with pleasure beneath them. She'd never done anything like this with a girl before, let alone two, and her mom and aunt at that. She loved it.
"Oh my god, yes!" she had moaned. "Lick my tits! Yes it feels so good!"
Mom had moved down her body, following the trails of cum wherever they led, and Aunt Katie had moved up, until in one mind-blowing moment, she found herself kissing her aunt while her mom licked her pussy.
"Someone had a very good time with the boys, didn't she," Mom had said after her first taste of Marie's pussy and the cum that was almost certainly still inside her.
Marie and Aunt Katie broke their kiss and smiled at each other. "It was so amazing, Mom!" Marie replied. "It was the best sex I've ever had! Their cocks are all so big and hard and they stay hard after they cum!"
"Kyle and Kevin are wonderful," Aunt Katie said. "They always fuck me so good."
"And my boys are incredible too," Mom said. "Marie, I'm so happy you finally got to experience your brothers' cocks."
"Do you have sex with Darren and Bobby and Billy, Mom?"
"Yes I do, sweetheart," Mom said. "They are so good at making me cum. I hope they gave you some good orgasms."
"Oh my god, yes!" Marie gasped, still buzzing from the pleasure of her mother's expert pussy-licking. "And if you keep sucking my pussy like that I'm going to cum again!"
So Mom had given her a wonderful orgasm, and Marie had experienced her first taste of another woman's pussy at the same time when Aunt Katie straddled her face. Marie was pretty sure she could taste boy-cum in Aunt Katie's pussy.
Now they were all together in the shower, touching each other playfully, but not outright sexually. Marie was enjoying the feel of breasts that were very much like her own, only attached to different women. She especially loved when they traded places under the cascading shower water and her tits pressed up against Mom's or Aunt Katie's. They told her about how each of them had been having sex with their sons, and that Mom had been waiting for he right time to bring Marie into the fun now that she was eighteen.
"I can't believe I used to think Jimmy was a decent fuck," Marie said to laughter from her mom and aunt.
They finished up and Marie and Aunt Katie wrapped themselves in towels for the trip down the hall to get into their bathing suits while Mom stayed behind to put on her own bikini and a beach wrap. Mom had ordered the boys to get their bathing suits on because Aunt Nora and the girls would be here at any minute and Marie's graduation party was going to get started. Aunt Nora was Dad's sister, unrelated to Aunt Katie or her children. The girls were older than Marie by a year or two, Nicole and Natalie, but she hadn't seen any of them for several years.
Now in her bedroom, Marie shed her towel and stood looking in her full length mirror at her naked body and smiled. She was tingling all over with the memories of her brothers' cocks and her mom's sucking lips and probing tongue. She reached down and slipped her middle finger into her pussy and Kendra walked into the room behind her.
"Ooooo," Kendra said. "Someone is having fun!"
Marie smiled and didn't stop fingering her pussy. She looked at her gorgeous older cousin's reflection in the mirror behind her own. "I was just trying to pick out a bathing suit, but I got horny," Marie said.
"That's really sexy, Marie," Kendra said, and Marie was surprised at how gratifying the praise was coming from the cousin she'd always thought was prettier and sexier than herself.
Kendra began to undress and Marie turned to watch directly, but she didn't stop playing with her pussy.
"Have you ever had sex with Kyle and Kevin?" Marie said and Kendra paused to look at her halfway through taking off her bra. Her tits were already bare and looked amazing as they wiggled on her chest. Her bra straps had only made it down to her elbows, but Kendra quickly recovered, standing up straighter and smiling and tossing her bra onto Marie's bed.
"I have sex with them all the time," Kendra said.
"I just did," Marie said. "While you were gone. My brothers too."
This took Kendra by surprise. "All five of them? That's amazing! I'm so jealous!"
"I can't believe how good it felt," Marie said. "I've never been fucked like that before."
Kendra took off her panties and stepped up close to Marie, so close that their nipples almost brushed together. "You're just like me, cuz," she said. "You go wild for huge cocks."
A shiver of pleasure shot up Marie's spine just as Kendra reached between her legs and began helping her to achieve an orgasm.
* * *
Natalie usually hated the drive to Uncle Mike's house. She'd been prone to car sickness as a kid, and while it happened much less often now that she was nineteen, she still always associated the hour drive along back roads through the New England woods with that feeling of nausea from childhood.
But long drive and nausea aside, she was having trouble containing her excitement to see her cousin Darren again. She'd had a massive crush on him since she was twelve, one that had faded in the middle teen years, but came roaring back two years ago when they'd become Facebook friends and she started seeing pictures of him with his friends and even girlfriends on a regular basis. All four of her cousins had that stunning combination of pale skin and blonde hair and blue eyes just like Uncle Mike, but something about Darren just made Natalie crazy. She hadn't been able to see her cousins as often as she would have liked because her douche-bag father had never got along with Uncle Mike for some reason. But now that the douche-bag was out of the picture, living down in Texas with his stupid girlfriend, Natalie and her mom and sister could visit Uncle Mike and Aunt Carla whenever they wanted.
It was almost oppressively hot today, and Natalie was grateful for the working air conditioner in the car and the fact that Uncle Mike had a pool. But she was even more excited to wear her new bikini in front of Darren. She'd been a skinny teenager the last time they'd seen each other, but it had also been Christmas and bone-chilling cold, and her outfit at the time had been nothing like the curve-hugging skimpy bathing suit she was going to wear in Darren's presence today.
The air conditioner in the car was actually running a little too cold for Natalie's taste. Her mom and her sister Nicole however were sitting in the front and had command of the controls and both of them ran a little hotter than Natalie in general. She'd brought a blanket just for this situation, which she used to keep her bare legs warm for the ride. She also found that it allowed her to touch her pussy relatively incognito as long as Nicole was asleep (she was) and Mom's eyes were on the road (obsessively). Not that either would have minded if they'd known what Natalie was up to. It's not as though Mom and Nicole didn't already know what her pussy tasted like and she theirs.