Felicity was furiously typing on her computer keyboard, working on tracking the movements of the gang leader Oliver was currently pursuing on his motorcycle when one of her machines pinged loudly. She quickly glanced up, checking which machine it was. Recognizing it as the one she was using to run the DNA sample that Roy had given her, she dismissed the noise and focused back on what she was doing. Her interests in Roy's blood were purely academic, and were, therefore, not pressing, unlike the chase that Oliver was now engaged in.

Oliver needed her to do her job at that point of time…Roy's DNA sample could wait.

It was an hour later, with the gang leader Oliver had been pursuing safely handed over to Lance and arrested, before Felicity glanced at the machine that had been running Roy's DNA again. Oliver was working out, because, apparently, the fight with the gang leader hadn't used up enough of Oliver's energy. Sara was watching Oliver, a bottle of beer clasped closely in one hand as she relaxed before she headed home. Diggle had gone home already, although none of them blamed him. Lyla was getting close to her due date now, and Diggle had planned a romantic night at home for them both to enjoy before the baby arrived.

It was getting on in the afternoon, the chase with the Gang leader being one of the few times that the Arrow had been involved in something occurring in daylight. Luckily it was the weekend, so that none of them had been needed at their day jobs, but it had still been unusual. Felicity briefly wondered if she'd be able to go back home at a reasonable time of night. She felt like watching a couple of episodes of Game of Thrones, and spending the night chilled out at home with a tub of ice cream, a glass of red wine, and her favorite TV show sounded like a nice way to spend her Saturday night.

All thoughts of her plans, however, vanished as she looked at the screen in front of her, displaying the results of the DNA test.

It wasn't the first test that Felicity had run on the sample, but when none of the more specific tests she'd wanted to run had shown any difference in the makeup of Roy's DNA compared with any other human.

This time around she'd used a more broad approach to the test, using a sample from Oliver, as he'd been the only one around to give a sample at the time she'd started this test.

During the previous tests she'd used Ray Palmer as her control, mainly because she hoped that he wouldn't question it, thanks to his curious mind and own interest in science. It had also helped that Oliver was busy at the time she'd wanted to gather the sample, and she'd wanted the tests to involve another Caucasian male, like Roy.

Now, however, her throat tightening and her heart pounding in her chest, Felicity wished she'd just waited for Oliver in the first place.

'Oh my God," she choked out, half rising out of her chair, her hands braced on the desk in front of her, as if being closer to the screen would change the information on display.

"Oliver…you really need to see this," she called over her shoulder.

"What is it?" Oliver replied, stopping his workout and approaching her casually, his bare chest more than a little sweaty. Felicity forced herself to ignore Oliver's state of dress, and instead pointed at the screen.

"I've been running the sample of DNA Roy gave me against the sample you gave me…and this is what it found.

"I thought you were checking to see if Roy being a werewolf impacted on his DNA?" Sara asked, rising from where she'd been sitting on the ground, "I'm pretty sure we'd know already if Oliver was a werewolf."

"It's not that," Felicity shook her head as Oliver reached her, rubbing her shoulder reassuringly, before he bent down a little and looked at the screen himself. Sara, for her part, kept her distance, not sure if this was something that she needed to know about.

"How…How certain is this?" Oliver asked a few minutes of silence later.

"Over 98 percent," Felicity offered promptly in response, 'I would run it again, but I've only got one sample of Roy's DNA, so it's not like it would change anything at his end."

"Is there any way to confirm for sure, with what you do have?"

"I can run the test again," Felicity offered, "Just to make sure I do get the same result. Even with the technology at PalmerTec the best I could get would be a 99.98 percent. There always is a margin of error…but…Oliver, how would this be possible?"

"Is everything OK? Is there something wrong with Roy?" Sara asked. Although she hadn't known him for very long Sara liked the younger man, and she didn't want anything to happen to him, especially now that she knew he was a friend of Stiles'.

"According to this,' Oliver gestured towards the machine as Felicity went through the process of repeating the test, "there is a 98 percent chance that Roy and I share a parent."

"What?" Sara exclaimed, "But, hang on…would that make Roy and Thea brother and sister?"

"It's on the paternal side, so, no, Thea and Roy aren't related," Felicity interjected as Oliver sunk to the ground, "besides, Thea is five months older than Roy, so physically not possible for Moira to be the mom of both of them, unless Roy was very, very premature, or someone, at some point harvested one of Moira's eggs, and it was fertilized, then carried by a surrogate."

"I always knew that my dad had affairs…he sucked at hiding it. When I was younger I couldn't believe that the press never caught wind of it. When we were teenagers Tommy and I used to joke about how many illegitimate kids our dads had probably fathered over the years. I never thought that I would actually meet one of them though…not like this." Oliver softly told them, his gaze fixed on the ground between his shoes.

"But…Didn't you say that Roy's dad died in the car crash that Roy's mom was in, the day before Roy was born," Sara asked Felicity, who nodded, bringing up the information on her computer. Felicity and Sara both read through the information once again, although it hadn't changed.

"Oliver maybe this is a good thing," Sara said once she'd finished reading. Felicity knelt on the concrete beside Oliver, resting her hand on his should reassuringly.

"Sara's right," she told him, "From what we know Roy hasn't had many older male role models that he can trust before he met you. He trusts you…possibly more than he trusts anyone, except maybe Thea."

"I…I need to go and check on something. I won't be back…not tonight. I'll see you tomorrow." Oliver shook his head and abruptly rose to his feet. He left the underground basement without another word, leaving Sara and Felicity standing in the silence left in his wake.

"Is he ok? Should we go after him?" Felicity asked Sara nervously. Sara shook her head sadly.

"He's had a shock," Sara pointed out, "I think he just needs some space. Besides, it sounded like he knew where he was going."

Felicity nodded, and rose back to her feet, glancing at her computers, at the information that had changed the lives of two of the men she was closest to. As much as she'd planned on watching some Game of Thrones when she'd gotten home, she hadn't wanted to have a plot twist like this crop up in real life. It was something like out of her favorite books series turned TV show, only Felicity hoped that it turned out better for Oliver and Roy than it was bound to turn out for any of the characters from Westeros.

"I wish there was somebody that could confirm this, but everyone that might know the truth is dead…Roy's mom and the guy she was married to, Oliver's parents, Robert Queen might have told Malcolm Merlyn, they were friends after all. Do you think Walter Steele would know?"

"Maybe…Moira Queen might have told him. Next time you see Oliver you should ask him if he wants to ask him."

"Yeah," Felicity nodded, "I guess I will."