An 18-year-old boy turned himself in to police after confessing to his mother that he'd sexually molested two young children at a motel. 

Joseph Hayden Boston of Southern California was brought to a Riverside police station on Saturday by his mother after he confessed his sexual crimes. He allegedly told his mother he sexually assaulted two boys, ages 8 and 4, while he was staying at a motel, Riverside police spokesman Officer Ryan Railsback told CBS News.

While speaking with investigators, Boston also confessed to molesting "upwards of 50 children" dating back to when he was 10 years old, reported CBS News. The other incidents happened in different cities where he had lived.

While Boston stayed at the Simply Home Inn & Suites, he reportedly befriended an 8-year-old and 4-year-old. The boys also stayed at the motel with their parents. Eventually, the children began going into Boston's room at night, where they were allegedly molested. 

The County of Riverside Child Protective Services took custody of both juvenile victims from the motel, Railsback told CBS. 

Boston was arrested on suspicion of two counts of oral copulation on a child under the age of 10.