Try to figure out what you may have said to her that might have caused her to feel pressurised. An alternate way to approaching this situation could be to change your approach towards motivating her and letting her know that no matter what happens she is loved and appreciated. I feel blessed to have them in my life, they are everything for me, my friends, my confidants. We are a gang of three. We all have witnessed some instances in life when she has stepped out of the shoes of a mother and has become a friend. Although, I was too young to comprehend what really happened at that moment, but those memories have scarred me for life.