Aslan be thanked, the Pevensies all made it out of the battle without any serious injury. Yes, Peter's shoulder needed to be properly seen to, and they all had their fair share of cuts and bruises, but largely she and her family members had gotten out unscathed.

That, of course, let them help those who weren't so lucky-- which is exactly what the Gentle Queen had been doing before she realized, as the adrenaline started to fade, that the fall she'd taken when the How and started to crumble hadn't ended as well for her ankle as well as she'd thought.

It's easy enough to find an excuse to spend most of her time sitting down-- bandaging arms and cleaning wounds is easy enough to do from such a position. It's not so easy, when the young Prince comes to tell her that her siblings are looking for her, to hide the limp as she gets to her feet and starts to move.