Sigyn approached the pair as though she was going to walk right past them, like they were not her intended target at all. At the last moment, her shoulder bumped right into Tony Stark's. And in that very second, she was sure that she'd found Loki. Pretty sure. Mostly sure. He moved like Loki, he felt like Loki, but she needed to look into his eyes to be absolutely certain.
“Excuse me,” she said. “So sorry. I hope I didn't hurt you. I was just looking for my husband.”
Then she gave a slow smile, looking directly at Tony Stark. Though the top half of her face was hidden by a mask and make-up, he'd still be able to see her eyes and recognize her smile. Wouldn't he? He better! That blonde hussy better not have turned his head so much that he didn't realize his wife was standing next to him!