A blonde, a brunette, and a redhead all work at the same office for a female boss who always leaves early.
"Hey, girls," says the brunette one day, "let's go home early tomorrow. She'll never know."
So the next day, they all leave right after the boss does. The brunette goes home and does some gardening, the redhead goes to a bar, and the blonde goes home to find her husband having s*x with her female boss.
She quietly sneaks out of the house and goes back to work.
In the morning, the brunette says: "That was fun, we should do it again sometime."
"No way," says the blonde. "I almost got caught."