Don't worry about the 'scoldings' in the labour room. It is our spontaneous reactions to the labour pains. If you feel worried about it, then have a talk with your wifey - let her know what is your main concern and what you can do during thise moments to help both of you cope better.
My hubby went from no experience (doing nothing) during the first birth to somewhat experienced (doing something) during the second birth. Like he would help me monitor the contractions and inform the nurses when I feel pressure to push. Some ladies liked to be massaged, some prefer not to be touched, etc. so talk to your wife and let her say her preferences, so you can help her better.