According to her primary data repository, the parasympathetic sector of her nanoautonomic nervous system was controlling her pseudolacrimal valves via a neurotransmitter program aptly dubbed acetylCho through both the nico-T1 and museRK receptors. The physiologistical response was a function of her grief protocols.

N-XS wept bitter tears.

"Those bastards."

Apparently it wasn't enough that they'd left her, they'd initiated a previously unused protocol that made her miss them too. It was childish and unnecessarily cruel and N-XS couldn't turn it off. Her external command function prohibited her from modifying or disrupting emotional programs activated by the crew.

This did not however prevent her from utilizing programs already in use. For example, her anger/resentment protocols.