Nibum clearly isn't going to go anywhere without seeing the captian perhaps to get more insight or orders from her. He swears he isn't up to no good and enters. He tries to look for any points of weakness from security or structure

You talking like your resigned to dying. We are gonna figure out whos responsible and bring them to justice. Freeing you of your charges. Its your ship and youve given me the oppertunity to work on it and make a home... ive become fond of this family.