A New Jersey teacher is accused of sexually assaulting a young student and later having a child with him when he was just 13 and living in her home, according to court documents.

A New Jersey elementary school teacher allegedly had a child with one of her former students, 13, who lived with her for several years — and was caught when the teen’s father noticed a similarity between his son and the child on social media.

The boy was about 11 years old when he and the teacher began sleeping in the same bed, state says. She’s jailed on abuse charges.