I taught people to drive for 39 years, and flew for 10 as a PPL. The relationship between teachers and pupils is always slightly tricky. I found that girls [and ladies] looked up to and admired you and it was, in driving, VERY easy to get into a romantic relationship. I was perfectly happy for this to happen, until I married a beautiful young girl who was NOT my pupil and I made it quite plain from then on that , whenever it seemed, from the pupil's side, to be heading towards rather more than friendly, then I made it plain that it stayed friendly, but no more than that. When I was learning to fly, my main instructor, a high ranking R.A.F. Officer, fell for one of his pupils, left his wife, and, as far as I know, pupil is now his wife. Commonsense and maturity play a large part in teacher/pupil relationships, and I had to terminate peoples lessons for them getting too close on several occasions. The situation is no different in flying instruction than driving. Use your head, stay clear of married women who show too much interest in you if you are married. They tend to be the worst offenders when it comes to wanting more involment