Always remember to bring motive into play, if the players steal a ship and the force sensitive PC knowingly allows this to happen, then that is knowing inaction which is 1 on the conflict chart, however motive has to be brought into play here , if the motive for the inaction is selfish then this generates at least another +1 minimum, if the inaction is nefarious then it is +5.
If the FS PC is gaining at any point where they generate conflict they would get somewhere between 1 & 5 additional conflict for the knowing inactivity as it could be looked upon as a selfish action if they knowingly gain from the theft (indirectly they get access to the stolen ship). This last part is often overlooked.