Disclaimer: I don't own anyone you recognize from Arrow, Flash or Legends of Tomorrow.

AN: I wrote this before Laurel died on Arrow. If I rewrote it to take her out, it would change to tone to something sad, and I don't want to do that. This is just a fluffy, sweet little story, so let's just pretend that Laurel didn't die yet. Okay?

Four: Birthday Party

When the Flash and Arrow teams gather for a birthday party, Sara brings an unexpected plus one.

Felicity laughed at Cisco as he dramatically described Barry's latest meta-human fight, complete with huge hand gestures. Including one that almost clipped Barry's ear, causing him to jerk his head to the side with a curse. Felicity looked over when the door opened, interrupting Laurel, Thea, Oliver and Diggle in their training.

"Hey guys!" Sara called as she came in. There was someone with her, but they were hanging back and Felicity couldn't tell who it was. Everyone called out a greeting. Thea and Diggle started to put the training equipment away while Oliver and Laurel came up onto the raised central platform to greet Sara.

"Sara, this is Barry Allen, Caitlin Snow and Cisco Ramone." Felicity did the introductions. Sara greeted the Flash team warmly, shaking hands and beaming at Cisco.

"You made my White Canary gear."

"Yeah. Is it working for you?" Cisco asked.

"Oh yeah. It's awesome. Great job." She looked toward her companion, who was still hanging back.

"Are you planning on joining us Len? Or are you just going to lurk?"

"Not sure I'd be welcome." A voice drawled mockingly. Barry leapt to his feet, and Cisco and Caitlin stared with wide eyes. "Team Flash and I have a complicated history. And the last time I saw the Green Arrow, he was shooting at me."

"That wasn't Oliver, it was Conner Hawke."

"He was wearing a green hood and trying to stick arrows in my ass. I don't care what he called himself, he was the Green Arrow."

"Oliver, do you promise not to shoot Len?" Sara asked.

"Not if he doesn't deserve it." Oliver agreed.

"See Len, if you behave, Oliver won't shoot you." Sara called.

Leonard Snart came forward into the light and joined them on the platform. He was dressed casually, in black jean, black boots, a white tee shirt and a blue leather jacket. Sara was wearing almost exactly the same outfit, except her leather jacket was white. Snart smirked at the assembled heroes, and wrapped an arm around Sara's waist, resting his hand on her hip.

"Allen, Ramone." Len said. He nodded at Caitlin respectfully. "Dr. Snow."

"Len, this is Felicity, Oliver, my sister Laurel, Oliver's sister Thea, and his friend John Diggle. Guys, this is Leonard Snart. He's a friend, and a teammate."

"He's Captain Cold!" Barry protested. "He's a criminal!"

"I'm a thief." Len admitted. "But I work for the good guys now."

"What are you doing here?" Barry demanded.

"I didn't dare leave him on the Waverider." Sara said.

"She's afraid I'd kill and/or maim Rip. Or Ray. Or Stein. The kid's okay. Kendra's cool."

"You like Kendra because she can keep a secret and she like's your cooking."

"I've got skills."

"Cocky does not look good on you." Sara shot back

"Everything looks good on me." He leaned in close and very obviously looked Sara up and down. "And everything looks even better on you."

Oliver blinked at the obvious leering, but both of his eyebrows shot up when Sara just laughed out loud and stretched up to kiss Len's cheek.

"Who knew you could be so sweet?" She teased. "Don't worry, I won't tell anyone."

Diggle's phone went off just then, cutting off Len's comeback. He checked the text, then waved at everyone.

"Okay, Lyla says she's ready. Let's head out." As everyone headed out, Sara turned to Felicity.

"Why was everyone down here instead of helping set up?"

"Lyla threw us out when Oliver offered to use arrows to hang party decorations." Felicity replied.

Len Snart wasn't exactly sure how he had ended up at little Sara Diggle's second birthday party, but it wasn't too bad. Although Caitlin and Barry kept giving him sideways looks, every one else, including Cisco, all seemed to accept Sara's acceptance of him. His and Sara's present was the last one, and Lyla grinned when Little Sara pulled all the paper off the box and Lyla opened it.

"Sara, Len, it's adorable! Where did you find it?"

'It' was a tiny little blue and white leather jacket, with a removable liner and hood. It was a little big for Little Sara, but not by much.

"Len actually found it." Sara said, from her spot on his lap. They were sharing the arm chair, and it was moments like this, when she was curled up against his chest, that he was reminded of how tiny she really was.

"He saw it in the window of this little leather shop in Italy last week. He took me to see it and I agreed that it was perfect for Little Sara. I picked out the other half."

Little Sara had already pulled out the other half of the present. It was a stuffed polar bear, with incredibly soft and silky fur and wearing a pair of dark goggles. The toddler giggled and hugged the bear close.

"Say thank you to Len and Sara." Lyla prompted. Instead Little Sara crossed to the arm chair and crawled up to join Sara in Len's lap. She hugged her bear, turned to cuddle into Len's chest and was asleep a few minutes later.

Grinning hugely, Sara hopped off of Len's lap and snapped a picture of the little girl snuggled up to the thief with her phone.

"Black mail?" Len asked mildly as she returned to her spot.

"Nope. Just something to look forward to." Sara pressed her nose into his cheek affectionately, and Len had to admit to himself that, as possible glimpses into the future went, this was one of the better ones.

Next: Kendra accidentally becomes the first one of the team to find out about Len and Sara.