You may feel safe at home and with your dad, but subconsciously, there may be things that are bothering. If that is the case, then the biggest thing that I can think of based on the tone of your post would be "hidden" stress. For that just try relaxation methods before you go to bed such as meditation and see if that helps your dreams contents to shift to another theme.

Also, another thing could be that at the moment of the dream you became stressed or confused by the dream and the dream took a wrong turn, if that is the case, then just try to hold your ground in dreams, try not to freak out or anything like that.