Understanding finally slides down over her face, her expression sobering. Yes, she can understand loneliness. Not exactly what he's feeling, no, but -- that suffocating feeling of isolation, no one to reach out to... Yes, she understands that part. And she does, to a point, understand why Piotr and Olivia cannot know. Sonia bites her lip and covers one of Miles's hands with hers.

"I do," she says quietly. "I'm...sorry, Miles. I can't even imagine."

Then she starts, jerking upright to look at Miles as a sudden thought finally occurs to her. "Oh my God, you're my nephew!"