Angry papa bear

 The past few days I have started back to work and my fiancé and the father of my DD has had to watch her. Last night she accidentally spilled tea on our TV stand. I got on to her and told her to sit while I cleaned. The situation was handled. He however proceeded to spank her and dropped her onto her couch (something they usually do in play but this time it was filled with anger. Then he yelled at her and asked if she was stupid. This is so new, but he has scared me to the point of wondering if I need to take her and leave. I've been told that I need to, but I've also been told that because he is not used to being with her 24/7 he may be getting overly frustrated with her and just needs to get away for a while. What do you ladies think I need to do? I need some unbiased advice.