Chrissy and Janet's efforts to get Jack into prime physical condition succeed beyond their wildest expectations when their voluptuous gym instructor falls for him.
- The girls bring their lovely gym instructor home and Jack decides enroll for exercise. When he tells Harvey, the owner of the Gym, that he's only there to get close to the lady, Harvey gives Jack a workout that he'll never forget. The next day Jack can hardly move and isn't sure he can keep his lunch date with the lady when she arrives at his apartment Jack limps his way through and has just gone to lie down when the girls bring Harvey home for lunch. He almost kills Jack when he finds out that he's been seeing his sister but she steps between the men, then almost does Jack in with more exercises.