The Trap
A woman was sure that her husband was cheating on her by having an affair with the maid, so she laid down a trap.
One evening, she suddenly sent the maid home and didn't tell her husband.
That night when they went to bed, the husband gave the old story, "Please excuse me my dear, my stomach aches" and went to the bathroom.
The wife promptly went and got into the maid's bed. She switched the lights off. When he came in silently, he wasted no time or words and had his way with her.
When they were finished and both still panting, the wife said, "Well my dear, you didn't expect to find me in this bed, did you?" And turned on the light.
"Absolutely not!", said her son.