A former prosecutor was sentenced Wednesday to two years in prison for having sex with boys after her 16-year-old daughter told the judge she and her mother had competed for the same 15-year-old boy. Beth Modica, 44, wept as her daughter Danielle told the judge she banged on the bathroom door at the family home in Sloatsburg, New York, one day last year as her mother and her boyfriend engaged in oral sex. "I was betrayed by both of them," Danielle Modica said. Beth Modica told her children to lie to their father - the Spring Valley police chief - about the marijuana and alcohol she gave to them and their friends, Danielle Modica said. She urged Rockland County Judge Catherine Bartlett to send her mother to state prison.