( CNN ) -- A Massachusetts husband and wife were each sentenced to prison Monday after being found guilty last month of raping their two adopted children . Joseph Mayotte , 50 , sexually abused his daughter over a five-year span , starting when she was 8 , according to a news release from prosecutor Joseph D. Early Jr. Mayotte was convicted in August on 11 charges -- including rape of a child aggravated by age difference -- and was sentenced Monday to 16 to 20 years in prison . His wife , Linda Mayotte , was convicted on 19 charges -- including three counts of rape of a child -- and sentenced from 18 to 22 years behind bars . The 49-year-old became pregnant with her adopted son 's child when he was only 15 , according to Paul Jarvey of the Worcester County District Attorney 's Office . It was a pregnancy she carried to term , Jarvey said . `` Let them burn in hell , '' is what the son , now 21 , said of his former parents in an impact statement read in court today , according to Jarvey . The Mayottes , who lived in the central Massachusetts town of Northbridge , were arrested in 2009 . The two adopted children -- along with the child to whom Linda Mayotte gave birth -- were adopted by other families . `` Their trust was broken by these two predators , '' Early 's statement said . `` Now , justice has been served . '' Man abducts , rapes three teens over ten years .
Joseph and Linda Mayotte of Massachusetts were convicted last month . Prosecutor says Linda allegedly became pregnant by her adoptive son , who was 21 . He faces 16 to 20 years in prison ; she faces 18 to 22 years . Now 21 , the adoptive son reportedly said in court : ' Let them burn in hell '