Roy just assumes Felicity and Oliver are dating and start babbling about it, like if Thea has mentioned that she thinks Oliver and Laurel are over for good, etc or he asks Diggle how he deals with their relationship, if they have rules or something in the lair
Heads poke up from around the room to take a look at what Roy’s waving around.
“Felicity,” he grins. “I believe these are yours?”
“What?” she yelps. “That’s not mine!”
He stretches the panties in both hands now, making sure she can see it clearly.
“Really.” He throws a look over to Oliver, who’s looking unusually guilty. Frowning, Roy turns to Felicity, who has her arms akimbo, standing indignantly. His eyes slice to Digg, who’s shaking his head, then to Sara, who’s looking anywhere but Oliver. He drops the underwear, staring accusingly at Oliver. “What the fuck, man?”
Oliver just turns back to his punching dummy.
Roy starts for him, but Digg’s there with a hand on his arm.
“Don’t,” he mutters.
Felicity’s still standing there, but her arms are wrapped around herself, staring at the ground. During the short time he’s known the blonde, he’s grown to like her. She’s smart and funny and she’s nice. She deserves better than a cheating bastard. She deserves someone to stand up for her.
He shakes the man’s hand off and marches over to Oliver.
“Look, whatever it is that happened between you and Felicity, it doesn’t make what you did with Sara right.”
“What are you talking about?” Oliver growls.
“It’s not cool, man. Felicity deserves better.”
“Then why the fuck did you sleep with Sara?”
“What does that have to do with Felicity?”
“She’s your girlfriend,” Roy says, disbelieving of how twisted this guy’s moral compass is.
“My girlf—” he splutters. “Felicity is not my girlfriend.”