A/N: Happy Fourth of July to any American readers! (And Happy Wednesday to everyone else). Continuing with the holiday theme, let's see what these two get up to on this national holiday. (And my apologies, but this is kind of a crack fic chapter...but I had an idea and had to run with it. Hopefully you'll enjoy the ridiculousness).

"Are you serious right now?" Regina rolls her eyes as she walks over to where Emma's iPhone is resting on the counter. She hits the 'next' button on the Spotify app, ceasing the brass band and vocal talents of Chicago and the melody of "Saturday in the Park" that had been blasting through the Bluetooth speakers.

"It was thematic. And better than America the Beautiful," Emma defends as she pulls her hair back into a low ponytail, slipping her feet into her red Converse. "Are you ready to go?"

"Yep," Regina says as she grabs her keys.

"Do you know where this place is?"

"Vaguely. Some mansion in Alexandria. Once we get out of the city it shouldn't be too hard to find," Regina replies. She grabs her purse and opens their front door, gesturing for Emma to walk through. "I just hope this is fun. I hate parties where I don't know anyone."

"Well, you know Jefferson and Will…and me."

Regina can't hold back her eye roll. "Obviously. I just meant that Jefferson and Will's Fourth of July party is always so epic, and by now I at least know all their friends. I'm surprised Jefferson is passing over the torch this year to whoever these Decker people are."

Emma shrugs. "We'll find out. If it sucks, we can always leave. I just don't want to get stuck in the chaos of the Capitol Fourth celebrations."

"Worst case scenario we can get a hotel somewhere in Alexandria if we can't make it back without getting caught up in the chaos, but hopefully this won't be bad and we'll be out late enough it won't be an issue," Regina adds as she pulls out of their alleyway and onto the street.

*.*.*

"Regina! Emma! You made it," Jefferson calls as he sees the two women walk into the backyard. He's clearly already three sheets to the wind, and the red Solo cup in his hand indicates he has no intention of slowing down anytime soon.

"We did," Regina smiles as he pulls her into a hug.

"I'm so glad. Let me introduce you to everyone," he says, releasing Regina and grabbing for Emma's hand, tugging her along into the yard. Regina follows dutifully behind them as he walks over toward the pool, where a handful of guests are playing a lighthearted game of water polo. "Tom!" he calls as he signals to the guy manning the grill. Regina can't help but think that he looks like he just walked out of Melrose Place — far too pretty to be real, and there's something caricature-like about him. "These are my good friends, Regina and Emma. Ladies, this is Tom Decker. One of the hosts."

"It's nice to meet you," Emma says as she shakes his hand.

"You as well," he says, moving to shake Regina's hand and holding it a bit longer than necessary. He looks at her a little too intensely.

"You have a lovely home," she says, pushing past the moment.

"Thank you. Perhaps we can give you both a full tour a little later," he smiles before turning back to the grill to flip the burgers. "Can I get either of you a drink? Margarita? Harvey Wallbanger?"

"Those both sound great, so whatever is easiest," Emma comments.

"Excellent. How about one of each? Then you two lovely ladies can share," he winks as he disappears behind the outdoor bar.

"I think he likes you," Jefferson whispers, poking his head between Emma and Regina before kissing them each on the cheek. "Good luck with that. I'm going to go find my handsome husband."

"What did Jefferson mean by that?" Emma asks.

"Here you are," Tom says before Regina can respond, setting the two drinks onto the bar. "Enjoy. And if you want to come back for seconds, you know where to find me."

"Thanks…" Emma says, turning around and delicately taking the straw between her teeth as she sips the fruity beverage.

"What's with that guy?" Regina asks as she does the same. They find an empty lounge chair on the deck and claim it as their own.

"I have no idea. Maybe he was just being friendly?"

"Seemed a lot like flirting to me…but with both of us, which is weird," Regina says, draping her arm around Emma as she peers over her shoulder. Tom catches her eye and winks at her. She quickly turns back to her wife, pulling her a little closer.

"Isn't he married?" Emma asks.

"I thought that's what Jefferson said, but I haven't heard anyone mention his wife."

Just as they began to settle into the lounger, a voice startles them from behind. They turn around to see the gorgeous brunette. "You must be Emma and Regina," she says. "Tom told me we had some new arrivals. Welcome. I'm Trina."

"It's nice to meet you, Trina," Emma says, unable to stop her eyes from roaming the woman's body. She's wearing a small red and white striped bikini — fitting, for the occasion — and nothing else. Emma can't help but think she looks a bit like she could be Regina's sister. Her hair is shorter, and she's a little thinner, but not quite as muscular as Regina has become over the past few years, thanks to working out her stress from medical school and residency in kickboxing classes and through crossfit.

"You as well," Trina smiles, not-so-subtly checking out both of the women in front of her. When she finally meets their eyes again, she chuckles. "Well, please, let Tom and me know if you need anything… and I do mean anything at all." She says, bending forward slightly to place her hand on each of their shoulders, giving them both a generous view of her cleavage before she turns and walks away, hips swaying as she does so.

"Okay, what the fuck?" Emma asks, looking over at Regina.

"I have no idea."

*.*.*

"Another drink?" Trina asks the women later that evening. The cookout portion of the party ended hours ago, but the drinking, desserts, and fireworks are still on-going. Emma and Regina have moved inside, along with Jefferson and Will and a few other guests. The majority of the guests the women met earlier in the day seem to have vanished. Regina can't recall any of them leaving, and there are still a lot of purses and shoes piled in the corner of the living room, but the people are nowhere to be seen.

"I'm good," Regina says. "Thank you, though."

"Then how about that grand tour?" Trina offers.

"Oh, sure," Regina says. She stands up and extends her hand to Emma, who takes it graciously.

"Great! Follow me," Trina says, taking Regina's free hand in hers and pulling her down the hall.

"So, how did you two meet?" Trina asks as she guides them down the hall, showing them a few of the guest rooms. "Oh, shit, sorry!" she interrupts herself when she opens one of the doors and sees a couple making use of the bed. She quickly backs away, stifling a laugh.

"Oh, my," Regina says, averting her eyes when she sees the two naked bodies on top of the bedspread.

"Sorry about that," Trina says, closing the door to the room. "Usually they don't come up here."

"Usually?" Emma asks.

Trina just smiles. "So, you were going to say how you two crazy kids got together…"

"It's a really long story," Emma laughs uncomfortably.

"I've got time," the other brunette smiles. "This way," she commands with a flirtatious lilt in her voice. She continues the tour, opening the door to the master bedroom.

Emma looks over at Regina, who shrugs. The blonde then tells their story, beginning with meeting at Jefferson's New Year's Eve party when Regina was in college, and the abbreviated story of their subsequent hook-ups until they discovered that their parents were getting married years later and met again at the engagement party.

"Wait, so you're technically step-sisters?" Trina asks incredulously. "Well, that's unexpected."

"Oh, we know," Regina chuckles. "We try not to think about that. But in our defense, we were sleeping together long before our parents ever met."

"Whatever, you're all adults and not actually related," Trina shrugs. "Okay, this is the last stop on the tour." She pauses outside a door, her hand resting on the knob.

"Okay…What are you waiting for?" Emma asks, confused.

Trina bites her lip. "I'm not sure you'll be able to handle it."

"What is it?" Regina asks, her eyebrow raised.

"Our playroom."

Regina's mouth drops open, while Emma's eyebrows furrows. She finally speaks. "Wait, like Fifty Shades?" It's the first thing she thinks of when she hears the word 'playroom.'

Trina chuckles and shakes her head. "No. It's not that kind of playroom. Anything more than light bondage has never really been my thing," she winks.

"Well, I'm assuming you don't have kids…" Emma continues.

"It's definitely not a room for children, no," Trina smiles and takes a breath, preparing to explain what's behind the door. "Tom and I have an open marriage. As do many of our friends. This is where most of that goes down….no pun intended."

"Oh," Emma says, realization finally dawning on her face. "So the couple upstairs…"

"They relocated their fun, apparently. Or maybe they just weren't into having other people involved. Who knows," Trina clarifies. "You're welcome to check it out if you're interested, but no pressure."

"Hi, ladies," Tom says as he approaches from the opposite end of the hall, a young blonde in tow. He has his arm wrapped around her waist, pulling her into his side as his hand runs up and down her back. But, that doesn't stop him from stopping to kiss his wife as he passes by. "You heading in, baby?"

"I will in a bit. But, please, feel free to get started without me," Trina says with a smile, cupping his chin with her hand and quickly pecking his lips again, winking at the woman on her husband's arm when she drops her hand from his face.

"I look forward to it," he smiles before quickly cutting his eyes over to their guests. "But if there's a private party happening, do let me know."

"Somehow, I don't think you'd be invited to that one, dear," Trina smirks as she eyes the couple next to her.

"Touché," he nods. "But you'll tell me all about it later, right?" he whispers into Trina's ear. She just laughs.

With that, he guides the young blonde into the room. Regina and Emma can't help but crane their necks to peek into the room as the door opens, curiosity getting the best of them. They can barely see anything due to the low light, but they can see the outline of bodies scattered around, and with the door open for just a brief moment, they can hear the moans emanating from the space.

"Oh wow,' Emma says under her breath.

"Yeah," Regina exhales.

"So, do you want to go in?" Trina asks. "Of course, you're not obligated to do anything. Some couples just like the environment to be with each other. A few never even interact with anyone else and just do their own thing."

"Oh, um…" Regina stammers. Do I want to go in? Does Emma? she thinks. She's so far out of her element.

"I think we'll sit this one out," Emma squeaks out. "But thanks for the offer."

"Well, it's an open invitation. Always," Trina smiles. "Feel free to stick around and keep eating and drinking. But if you leave before I come back out, thank you for coming."

"Thank you for having us," Regina smiles. Trina leans over to kiss each of their cheeks before opening the door to the playroom and slipping inside, a chorus of 'Trina!' heard from inside as the woman disappears behind the closing door.

When the door latches behind her, the two women are left staring at it. "Um," Emma says.

"Uh huh," Regina mutters.

"So, shall we go home, then?"

"Yes, I think so." They turn to head back toward the main part of the house, grabbing their purses from where they left them on a chair in the living room.

"Leaving already?" Jefferson asks when he sees them scoop up their bags.

"Yes," Regina says, still flushed with embarrassment and shock.

"Trina showed you the playroom, didn't she," he says with a knowing smile.

"You knew?"

"Of course. Tom and Trina's parties are legendary. And they don't exactly keep their activities a secret."

"So you purposely invited us to a swingers' party?" Emma asks. "Are you out of your mind?

"What?" Jefferson shrugs. "It's not like anyone is going to force you into anything. You'll notice Will and I aren't down in the basement. Not everyone participates. And did you not have fun otherwise? Tom and Trina are the best, and they know how to throw a damn good party."

Regina rolls her eyes. "Well, still, a little head's up would have been nice. Trina and Tom have been flirting with us all day, but we thought it was harmless. We were a little blindsided by the proposition."

"Huh. Well, I guess I owe Will $50."

"What? Why?" Emma asks.

"He said you wouldn't go for it, but part of me thought you might. You've both always been a bit free-spirited, especially considering you hopped in to bed together the first night you met…and the second…and the third…"

"Okay, we get it, Jefferson," Regina interrupts. "And that's different. We were young and single. We're very much happily married now. Monogamously."

"Suit yourself. I also figured that even if you wouldn't take them up on their offer, you might at least hook up in the playroom. Will and I did that once."

"Seriously?" Emma's eyebrows raise. "You guys did it in a room full of other people?"

"Yep," he smiles. "We were drunk. So were most of the other guests. I doubt anyone saw anything anyway, but it was hot. Nice change of pace. Exciting."

"I don't know what to say to that," Regina deadpans. She then turns to her wife. "Ready to go home?"

"God yes."

A/N: I mean, how can you not have a semi-Swingtown crossover for the 4th of July? :P