question:  Why doesn't Trella tell Quest about her mission?
context: This e-text was produced from Amazing Science Fiction Stories March 1959. Trella feared she was in for trouble even before Motwick's head dropped forward on his arms in a drunken stupor. Trella had not wanted to come to the Golden Satellite. A woman could not possibly make her way through these streets alone to the better section of town, especially one clad in a silvery evening dress. Perhaps she could call one of Motwick's friends; she had no one on Ganymede she could call a real friend herself. Trella swung with her whole body, and slapped him so hard he nearly fell from his chair. The dark man moved in on Trella again as Kregg overtook his quarry and swung a huge fist like a sledgehammer. Exactly what happened, Trella wasn't sure. She had the impression that Kregg's fist connected squarely with the short man's chin before he dodged to one side in a movement so fast it was a blur. The dark man, who had grabbed Trella's arm, released her and ran for the door. Trella ran to the unconscious Motwick's side. He followed Trella out the door of the Golden Satellite and fell in step beside her. “It was drawn into Jupiter, but he landed it successfully,” said Quest. I was born and brought up there, and I was finally able to build a small rocket with a powerful enough drive to clear the planet.” “If Dr. Mansard succeeded in landing on Jupiter, why didn't anyone ever hear from him again?” she demanded. Trella could get a cab from here, but the Stellar Hotel wasn't far. Trella had the desk clerk call a cab to deliver the unconscious Motwick to his home. For some reason she decided against telling him that the assignment on which she had come to the Jupiter system was to gather his own father's notebooks and take them back to Earth. Motwick was an irresponsible playboy whom Trella had known briefly on Earth, and Trella was glad to dispense with his company for the remaining three weeks before the spaceship blasted off.
output:  Trella's employer wants the mission kept confidential.
options:  Trella is afraid Quest won't love her if he finds out about her mission.  Trella is worried Quest will take his father's papers and leave her.  Trella was told specifically to stay away from Quest.  Trella's employer wants the mission kept confidential.