Obviously Nesta moved decently, with the help of Amren. And, while she'd never admit it out loud, Nesta started to eat more food. Not a ton, but she didn't go to bed hungry like back in Velaris. Of course Nesta made the decision to drink alcohol instead of eating food, preferring to drown her sorrows through drinking. She'd put on a touch of weight at least.
She definitely didn't plan on killing anyone. If Nesta wanted to kill someone, her blade would have done the trick.
This time she reacted too slowly and a jab made contact with her shoulder.