Though she can't tell specifically what he's thinking, she knows there's something there. It's in the way the end of his sentence is clipped, like there's a second half he's not quite sure he knows how to dive into.

"Well, I am from a different universe." Her voice is all wry humor, like an unspoken recognition of how profoundly weird it is that she's been dumped here in the middle of a mission. "How about this?" She releases his prosthetic arm and lets her fingertips trail lightly down the length of his other forearm instead.