There comes a time when a woman just has to trust her husband... for example...
A wife comes home late at night and quietly opens the door to her bedroom.
From under the blanket she sees four legs instead of two. She reaches for a baseball bat and starts hitting the blanket as hard as she can. Once she's done, she goes to the kitchen to have a drink.
As she enters, she sees her husband there, reading a magazine. "Hi Darling", he says, "Your parents have come to visit us, so after their long trip I let them take a nap in our bedroom. Did you stop in to say hello?