A/N: Prompt - Tesla reacting to a Tesla Motors car and this: "The Model S, Model X, and upcoming Model 3 are all part of a quest for the car line to spell SEXY or S3XY upon the release of Tesla's eventual Model Y SUV."

"You really need to get a better access point to the surface, you know."

"I'll make a note of it," Helen said sarcastically. "You'll have to forgive me for being motivated by trifling things like keeping hidden from a government that wants to destroy my work."

"Good," Nikola said, ignoring the last part. "The less I have to crawl through this disgusting sewer, the better."

"I'll try not to inflict it on you in the future."

"I don't see why you're dragging me up here anyway. I mean, you know I love spending time with you, but I'm an official Sanctuary staff member now. I have work to do." He gave her an innocent smile and his best responsible look. "Like building a teleporter to the surface, for one thing."

"Nikola, you were drinking wine and watching Operation Paranormal."

"Important research," he said without missing a beat. "Getting deep into the minds of creature hunters."

"You were bored," Helen corrected. She cleared her throat. "And I'm giving you a late birthday present, if you must know."

On his actual birthday, Helen had been on a deep undersea exploration, trying to find an escaped psych worm from Hollow Earth. Nikola had reluctantly stayed behind, after holding her tightly for a moment and telling her that he'd better be in the alternate reality this time if it went badly. Thankfully, it hadn't.

"Ooh," Nikola said, brightening a little. "But Helen, my darling, you know I'd much rather celebrate back home… by ourselves… in bed…"

"Patience, Nikola," Helen said, giving him a wink. His grin widened. "I think you'll like this."

Light was growing in front of them, and soon they emerged from the tunnel into an alley next to a building that Helen owned under a false name. (The name, though she would never tell Nikola, was Baumschlager. She had needed something that had never been connected with her, and it was the first thing that popped into her head.)

Helen had the back door key ready, and a few minutes later they were headed into a wide open space that Helen kept Sanctuary vehicles in.

"Alright," Helen said, leading Nikola to the center of the room. "Happy birthday."

His face lit up like a Christmas tree.

"A Tesla?" Nikola rushed over, stroking the car with a happy sigh. "Finally. I've been waiting forever to try one of these out. Ah, it's nice to be appreciated… Everything should be named after me, don't you think?"

Helen laughed. "I'm afraid it's not just for you, Nikola," she said, sliding past him into the driver's seat.

His eyes went wide. "You're gonna drive around in my car? You're right, this is the best birthday present ever."

"I'm glad you like it." Helen's lips twitched. "I admit, I was a little concerned you might be offended. You know, it's hardly the genuine article."

"Well, of course not," Nikola said. "I could come up with something better in my sleep. But hey, nothing wrong with a little appreciation, a few adoring fans… So tell me, did you get the model S, 3, X, or Y?"

Helen rolled her eyes as he grinned. He knew full well what it was, he just wanted her to say it.

"Ridiculous naming scheme," she said.

"Yeah," he conceded. "But accurate, right?"

Helen leveled a look at him. She wasn't going to take the bait.

"And now wherever you go, you can take me with you," Nikola went on, leaning over to inspect the dashboard. "Electric, sexy… Less huggable, sure, probably a little lacking on the brilliant repartee front, but that'll only be motivation for you to come back."

"Don't worry, Nikola," Helen said, chuckling and pushing him back into his seat. "I already have plenty of motivation to come back."

The smirk dissolved into a warm smile. "In that case, I'm happy to wait."

Helen smiled back. "Now, what say we take it for a spin?"

"Definitely. Hey, Helen, can I name it?"

"No."