On another occasion, I had a student whose husband forced her to take flying lessons so he could have a copilot in case he had a heart attack aloft. After five lessons of getting nowhere (she wasn't motivated), I discovered the problem and chatted with the cardiac captain. We came to an arrangement that pleased all. I taught her enough to land the airplane, which was all she was really interested in learning.
In recent years, I've made it a point to tell my students to inform me when personal issues make flight training difficult for them. Sometimes a short hiatus will solve the problem; sometimes a longer delay is in order. As a flight instructor, one of your most important jobs is telling people when they're simply not ready to learn.