A Fairfield cab driver pleaded guilty Monday to sexually assaulting an 18-year-old girl in his cab last year.

Bruce Northrop, 41, of Old Mill Road, a driver for Fairfield Cab, pleaded guilty before Bridgeport Superior Court Judge Robert Devlin Jr. to one count of second-degree sexual assault after admitting to the judge that he had sexual relations with the girl in his cab in May 2010.

The judge then told Northrop he will impose a two-year prison term when he is sentenced Feb. 17.

According to the arrest warrant affidavit by Fairfield Police Detective Kerry Dalling, the young woman complained last February to police she had been sexually assaulted by Northrop in May of the previous year.

The woman said she had been at a friend's house where she drank a half-dozen shots of vanilla vodka. Too intoxicated to drive home, she called the cab company for a ride, the affidavit states.

The woman recalled that the name of the driver was Bruce and that while they were driving she began to cry and complained to him she did not have a date for the prom, the affidavit continues. At some point, she passed out and when she woke up Northrop was on top of her having sex with her, according to the document. She said Northrop offered to stop to get a condom, but she told him she wanted to go home, the affidavit states.

Police said Northrop admitted having sex with the woman -- who he called "a hottie" -- in his cab, but claimed she was the aggressor. He said he agreed to have sex with her because his mother had just died and he wanted someone to be with, the affidavit states.

Fairfield Cab Co. officials were unavailable for comment.