I'm not really sure what to make of this. On one hand, Leina is clearly banged up with bruises and other injuries. On the other, Risty is completely naked. The facial expressions aren't particularly affectionate ones, so it's not an intimate kind of scene.
So what I gather from this is that Risty sleeps in the nude, which kind of suits her character and that Leina is too sore and weak to move about on her own so Risty is helping to prop her up while tending her.