Jus' sayin', but I do (vaguely) recall Mom and Dad having arguments. No specifics come to mind, but it could get rather heated.

Just remember, Mom is her father's daughter, and Dad is his mother's son (Gandma and Granpa Gene have always been the less volatile of the four, but even they can get riled up under the right condidtions).

That said, no one enjoys it when their parents fight ...