The people of the town have been on to their secret affair.
Did the child's mother have a secret affair in her past?
It was a secret affair for three weeks until I found out.
He had plenty of cover stories for his secret affair.
They begin a secret affair and soon conceive a child.
These are secret affairs of state and must be kept as such even from your most intimate associates.
Twenty men are too many for a swift and secret affair.
This leads to a passionate secret affair between the two of them.
Despite his anger and the evidence, he couldn't bring himself to believe that she had a secret affair going on with Rodney.
Then he had a long secret affair with his oldest friend's wife.