That's her fault, she knows. She killed He Who Remains, she destroyed the Sacred Timeline, and wherever she sent Loki, it was to a Mobius who no longer knew him, perhaps no longer knew either of them.

She squeezes his hand and says, "I'm sorry."

Those words aren't always easy for her, but she is truly sorry. Sylvie can't often allow herself to consider what she's done, how it's possibly broken the world, and she can't begin to apologize for it all, but she can apologize for this, to him.