[Laughing would be very, very, rude, and mean, and she doesn't; but she has to cover her mouth for a second and she's glad Spock can't quite see her face.
But what should she do? It's not really that important, and he might feel bad for the mistake if she drew attention to it. On the other hand, if someone else came to visit and saw it, that could be more embarrassing.
It came down to this: In the end, she'd like someone to tell her, so she could fix it and not be embarrassed later, wondering just how long it had gone on for and who had noticed.]
[Action]
But what should she do? It's not really that important, and he might feel bad for the mistake if she drew attention to it. On the other hand, if someone else came to visit and saw it, that could be more embarrassing.
It came down to this: In the end, she'd like someone to tell her, so she could fix it and not be embarrassed later, wondering just how long it had gone on for and who had noticed.]
Your shirt... You should turn it around, I think.