Wife return late home

One day wife comes home late at night and quietly opens the door of her bedroom.From under the blanket she sees four legs instead of two! So she picks up the baseball bat and starts hitting the blanket as hard as she could. When she is done she goes to the kitchen to have a drink and dinner.But as she enters, she sees her husband there, reading a magazine.Her husband says Hi darling, your parents have come to visit us, so I let them stay in our bedroom. Hope you have said hello to them.