She's doing it in the narrative because they're supposed to be getting Jim to rest, not starting another fight. It can wait until everyone's had some sleep.

"Thanks." She gives Jim a pointed look until he turns around before she changes. Sure, she could do the locker room change where layers and wriggling mean nobody really sees anything, but she'd rather not risk it. It's a good thing Jim's tall and his shirts are long enough to cover everything.

Once she's changed she sits on the bed next to Jim, reaching out to stroke his hair like it's the most natural thing in the world. "Hey there. Where do you want me?"