Fair warning, this story starts off a little slow, and my apologies for any spelling or grammatical errors. This is a work of fiction, and all of the characters are over 18.
* * *
Alex stepped into the den, glanced over at the lounge, and scowled.
It was the first weekend of the New Year, and his parents had thrown their customary family party. As per usual, the adults had set about getting drunk in the kitchen and living room, packing the kids off to the den to play games and watch movies. Not that they were really kids any more, little Nina having turned nineteen last September.
Which was part of the problem.
His cousin Robbie was the source of his annoyance. He was sprawled on the lounge, his attention focussed on the gorgeous blonde sitting next to him. Her head rested on his shoulder as she watched the movie intently, seemingly oblivious to the gentle stroking of his fingers on her upper arm and the many hungry glances he directed at her ample cleavage.
Under most circumstances, Alex wouldn't have a problem with Robbie using a movie as an excuse to get close with a girl. He'd done it often enough himself. But this girl was different.
She was his sister.
Alex wasn't sure exactly when Robbie's obsession with Mara started, but he knew for certain his cousin desired her for the last four years. They'd had a pool party to celebrate Mara's twentieth birthday, and when she came out in a red bikini Robbie's tongue had nearly dragged on the floor. His eyes had been glued to her the entire night, so much so that even his mother Valerie had half-jokingly told him off for staring so much.
Although Robbie had tried to be less blatantly pervy from then on, it was still pretty obvious to Alex that he had a big thing for Mara. He was guaranteed to come to any family event she went to, and even blew off partying with friends to do so. Robbie also made a point of regularly coming by the house, especially during summer, offering to help out with the gardening as an excuse to watch Mara swimming and sunbathing in annoyingly revealing outfits.
While staying at Robbie's place once, Alex had even found a whole bunch of photos on his cousin's phone, all of them involving Mara either wearing skimpy clothing or posing in ways that emphasised her full breasts and pert ass. Alex had no doubt his cousin masturbated to them frequently, but what he found more disturbing was Mara was clearly aware she was being photographed in every picture.
He was pretty sure Mara didn't return Robbie's feelings. If anything, she didn't seem to recognise them at all. She seemed completely oblivious to how he'd stare at her chest whenever she wore something tight, or how he always insisted on letting her enter rooms and climb stairs ahead of him. The few times he was extremely transparent with his affections, such as the time he got a sizable erection from wrestling with her in the pool, she casually brushed it off. At most he'd get a playful slap on the arm and be called a perv, but in general she either ignored or downplayed how much he lusted over her.
Yet despite not recognising his lust for her, she almost seemed to egg him on. She happily wore insanely revealing outfits around him without a qualm, playfully flirted with him, and endured ― if not encouraged ― physical contact. Her cuddling up to him during the movie was just one such example, where she was somehow unaware of the lustful undertones to Robbie's enjoyment of her company.
It annoyed Alex. He knew nothing would ever happen, they were cousins after all, but Robbie's persistence and his sister's ambivalence got on his nerves.
Out of pettiness, Alex chose to flop down next to Mara, and was rewarded with an irritated glance from Robbie as he was forced to withdraw his arm. Typically, Mara's only response was to sit up straighter, the slight jiggling of her breasts totally capturing Robbie's attention as she shifted position. As Alex himself settled into a more comfortable slouch, he was surprised to make eye contact with Jenna, Robbie's sister, who frowned at him disapprovingly.
"What?" he asked quietly, but she just shook her head.
"Later," she mouthed back, and returned to watching the movie.
It was a pretty boring movie, some shitty rom-com from the nineties, and Alex was almost relieved when Nina looked up from her phone and announced that if she got any more bored she was going to die. They unanimously decided to flick the movie off, but spent the next twenty minutes arguing over what else to do. Nina characteristically had no suggestions, but generally picked apart all of the other movies Jenna suggested they watch. Robbie was also fairly useless, keeping quiet except when seconding whatever activity Mara suggested.
Eventually, Alex suggested a board game. In hindsight, it was a tactical error. The group rejected Monopoly straight away, and tore through the rest of the games in short order.
Then Robbie found it.
"Hey guys," he said eagerly, roughly pulling a box from the pile of old games in the cupboard. "Look what I've got."
And he held up Twister.
Jenna groaned. "I suck at Twister," she sighed.
Alex wasn't surprised. Jenna wasn't fat by any means, but she didn't have the same willowy frames that Mara and Nina did. Where Mara was gentle, graceful curves and Nina was compact and petite, Jenna was curvaceous and full-bodied, with a round ass and soft, pillowy breasts. She actually reminded Alex a lot of an actress he liked, Ariel Winter, which was something he tried not to consciously acknowledge.
"I also hate Twister," Alex said, although his objection was based on more than dislike for the game. He knew Robbie only picked the game because it would give him a chance to see Mara contorted in various positions. He also wouldn't put it past his cousin to take the opportunity to rub up against her or "accidentally" put his hands where he shouldn't, and Alex had no interest in seeing that.
"Oh, come on Alex," Mara said, nudging him gently. "It'll be fun."
"I'm in too," Nina said unexpectedly. "Which means it's three against two, so we win."
"Heccas," Robbie said. "Alex, help me move the lounge so we have more space."
With a sigh, Alex did so, and they quickly unfurled the plastic sheet and spread it in the centre of the room. He was surprised and dismayed to see it was much smaller than he remembered it being, but a quick glance at Robbie showed him this only pleased his cousin. They were going to have get pretty close to play, which for Robbie was clearly a dream come true. Alex wasn't sure if he was just imagining things, but it looked like Robbie already had a bit of a bulge in his shorts.
"I'll do the spinner," Jenna said, scooping it off the floor and placing it on her lap. "Someone has to and I'm not a big fan of Twister anyway."
"Anyone else want a drink?" Nina asked as she stretched her lithe body in preparation for the game. Alex blinked and looked away, realising he'd been idly staring. "I'm in the mood to get a bit pissed, and it's not like the oldies will notice a few missing bottles."
"I could go for a few," Alex said, and Robbie and Mara did likewise.
"Cool," Nina said. "Go and grab them for us then, would you?"
"Nina," Jenna chided. "Could you be any lazier?"
"What?" Nina said. "Alex is a big strong man. Surely he doesn't mind doing his little cousin a favour?"
"It's fine, Jenna," Alex said, half-smiling despite himself. It was classic Nina. "I'll get them. What does everyone want?"
