problem in climbing partner

Dear Climbing Experts,

I am part of a climbing club at our school and have been climbing for about 9 months. My usual climbing partner who climbed about 6 months sometimes let goes of her brake hand when taking in the rope. I told her about her problem and she still does it. That was her only problem, and she later revealed to me that she didn't go to one of the scheduled climbing instruction lessons, but learnt the material from other climbers/ seniors who went. She didn't want me to alert the coach about her releasing brake hand problem. I tried ways to make her change it, but she still makes that mistake now and then. Should I continue trying to solve the problem by myself, or should I alert the coach or the seniors or some of our climbing friends/ leader on the same level as us about it? i don't want ill feelings, but this is a potential dangerous habit i want her to break, otherwise i don't want her to go belaying other people, and feel a need to alert our other climbing friends about it. Thanks!

Answer

Here is what I would recommend you do. I would talk to your coach because safety comes first. You are doing it not as something against your friend but to keep you and your friends safe. If we don't hold ourselves and our friends responsible while climbing that is when accidents happen.