This one is for today's prompt, but originally came via mashmaiden. Takes place in maybe season 10. Some mildly inappropriate content.

"Kens," Deeks called, lightly tapping on the door of her changing room. The latch clicked and the door popped open a minute later.

"Deeks, what the hell are you doing in here?" she demanded, holding a towel over her upper half. A pile of soggy clothes sat in the corner, creating a damp spot on the floor, courtesy of a suspect they'd chased straight into a pool.

"I have a problem."

"Baby, now is not the time." Her tone was vaguely regretful and he frowned.

"What, no, not that. Geez, it's like you think sex is all I think about," he said. She raised an eyebrow, challenging that statement. "Ok, fair enough, but it's not why I'm here right now."

"Then what's the problem?" Kensi finished putting on her shirt, gathering her bag and wet clothes as she pulled out a hairbrush. He followed her over to one of the sinks, watching as she started fixing her hair.

"I need a pair of underwear." At that, Kensi's eyebrow rose even higher. "Your underwear," he clarified. Making a vaguely disturbed face, Kensi pinched the bridge of her nose and said,

"Babe, I know we talked about trying something a little kinkier, but this is not what I had in mind."

"Ew, no. Again, I'm not talking about sex. I don't have any underwear in my go bag for some reason." She turned and he saw eyes drift down to his butt. "So, do you have an extra pair?"

"Deeks, I really don't think that's going to work," she said, but started rummaging through her duffle anyway. "Why don't you just go commando? It wouldn't be the first time."

"Yeah, not in these jeans. They rub some very sensitive parts and I'd rather not get blisters on my-" he gestured to his pelvic area and Kensi rolled her eyes.

"Yeah, I get the picture." She pulled out a couple of shirts, grabbing a small rolled up piece of cloth and unfurled it, revealing a pair of dark blue underwear with lace edging. "Ok, these are the only ones I have."

Just by looking at them, he could tell they would be way too small. After a moment of hesitation, he snatched them out of Kensi's hand and stuffed them into his pocket.

"Thanks. At least it's better than nothing," he decided. Kensi tugged him back as he started to leave, leaning up to whisper in his ear.

"I know I said I wasn't into it, but I do expect you to model those when we get home."

A couple hours later, Deeks was seriously reconsidering ditching the underwear and risking the chance of raw skin. Anything seemed better than the silky material that kept sliding up his butt, not to mention the squishing action going on in the front. As he'd suspected, they were several sizes too small.

"Deeks, what the hell is wrong with you?" Sam demanded, catching him middle of a wriggle.

"Nothing, just an itch," Deeks lied.

"You've been squirming all afternoon. You sure that pool was clean?"

"It's probably just the chlorine," Kensi spoke up and Deeks gave her a discreet nod of appreciation.

"Or maybe it's your lace underwear," Callen suggested with a smirk. Deeks immediately tugged at the back of his jeans, which were indeed dipping a little lower than he realized. Damn, he knew he should have worn a belt.

"You're wearing lace underwear?" Sam repeated, looking vaguely disturbed.

Deeks glanced at Kensi wildly, who shrugged at him. He chuckled nervously, feeling a bead of moisture gather in the middle of his back.

"Of course not," he scoffed. "Why would I be wearing lace underwear? That is entirely ridiculous and not true."

"Deeks, unfortunately I've seen your underwear way more times than I have ever needed to and that was definitely lace."

"Guys, they're my underwear," Kensi explained and Deeks glared at her in astonishment.

"Kensi, why would you tell them that?" he asked, shocked by her betrayal.

"C'mon babe, it's not like they were going just let it go."

"Somehow that's even worse," Sam said. "You'd think you guys could at least keep that stuff out of the office for once."

"Ok, once again, this has absolutely nothing to do with sex," Deeks insisted. "I didn't have any underwear, so I borrowed Kensi's." Callen started outright laughing at that. "It's actually very liberating and not at all humiliating and deeply uncomfortable."

"Do I wanna know what's going on here?" Nell asked suddenly, standing at the entrance to the bullpen. Based on the look mixed with trepidation on her face, she'd been standing there for a while.

"Deeks is wearing Kensi's underwear," Callen answered helpfully before Deeks could say anything. Groaning, Deeks thumped his head on his desk.

"Okaaaay then."

"It's not what it sounds like," he said to Nell, who grinned.

"I'm sure the boys can fill me in," she said. "I'll meet you guys upstairs." Deeks groaned again. Kensi walked over and brushed her fingers through his hair.

"Babe, it's not that bad." He gave her another incredulous look and slowly got up to follow everyone upstairs.

"My question is why didn't you just come to one of us before you asked Kensi?" Sam gestured between himself and Callen. Deeks glanced at Kensi who inclined her head consideringly.

"I did not think of that. That definitely would have been a better idea. But seriously guys, you're not going to Nell, or anybody else, about this, right?" Callen and Sam shared a look and grinned.

"Not a chance, Deeks."

"This is way too good to keep to ourselves," Callen added.

"Guys, really. We're supposed to be friends!" he called after them.

"Should have gone commando," Kensi said, patting his shoulder.

A/N: I chose the picture for this one because it had Kensi and Deeks in the bullpen. For some reason it's kind of hard to find a picture that accurately expresses "I'm wearing my wife's underwear and I don't want anyone to know".