"Of course you can." For the kids, not for her; she thinks that's what he means, anyway, and she can't really blame him. Being dropped in the middle of this just to find out that she was with another version of him, that they were married and had a child...it's got to be weirding him out. She gets it. She remembers how she felt when she learned about Dr. Carter and how she and the Jack in her timeline were married.