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.

Leaving the covered bodies groaning, 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 I let them stay in our bedroom. Did you say "hello"?