The pair reportedly met this summer and enjoyed a fling, Il Messaggero reported.
But the man soon grew weary of the amorous adventure, and refused to have any more intercourse with the woman, who is separated from her husband.
Unhappy with the rejection, she then allegedly locked him in the basement of her home in Arzano, a town north of Naples.
It is unclear from the reports just how long the man was kept in the room, but he somehow managed to alert a passerby to his presence.
“The young man, visibly frightened, managed to seek help from a passerby, who told the police immediately,” Il Messaggero reported.
After being freed, the man explained what happened and the woman was arrested on suspicion of abduction.
The woman, originally from Naples, moved to the Liguria region, in Italy's north, after separating from her husband. She was back in the area for a holiday when she met the young lover.