The 9 Year Old Boy, and His Mother's Lover

A woman takes a lover home during the day while her husband is at work.

Her 9 year old son comes home unexpectedly, sees them, and hides in the bedroom closet to watch. Just after getting into bed the woman's husband also comes home unexpectedly, she tells her lover to hide in the closet, not realizing that the little boy is in there.
After a little while the little boy says, 'Dark in here.'

The man, who obviously got a real fright not expecting to hear anything,