Alexis Mercedes Boberg, 25, turned herself in to authorities in Anne Arundel County in Maryland on Monday

A Baltimore substitute high school teacher groomed a teenage boy with snow cones and booze then had sex with him at her grandparents' home last month, according to prosecutors.

Alexis Mercedes Boberg, 25, turned herself into police on Monday after a student at the Center of Applied Technologies North told police that he had met up for sex with the teacher at various locations in May.

Having exchanged numbers at the school, the pair reportedly first began communicating on Snapchat, where messages soon turned sexual and investigators claim Boberg even sent the boy explicit pictures.

Before having sex, Boberg took the teen and one of his friends to snow ball stand in Glen Burnie, buying them both snow cones before chatting to them in her car.

She is then accused of driving the boys - whose ages have not been revealed by police - to a liquor store and buying them two miniature bottles of rum, which they both drank.

Days later, on May 24, Boberg reportedly met up with the boy at her grandparents' home in Severn.

Police say the boy waiting outside the property until Boberg gave him the signal to sneak into the backyard and entering the property secretly through a back bedroom, where they had sex.

Boberg has been charged with two counts of fourth-degree sex offense for having a sexual contact with a person while in a position of authority for meeting with the teen off school grounds several times in May and engaging in sex acts while supplying him with alcohol. Boberg pictured above in old social media photos

On June 4, a student at North County High School (above) reported her for engaging in sexual activities with him and for providing him with alcohol

Courtesy of WJZ

A few days later, prosecutors claim she met up with the boy once more at a local mall before returning to Boberg’s car and performing sex acts on one another.

Police were informed of the two instances on June 5, shortly after the boy confided in his mother about the purported relationship.

The mother soon after filed a court order to forbid Boberg from contacting her son and to stop appearing at her place of work.

‘During the last 20 days, my son has been manipulated into a sexual relationship [with] his substitute teacher at school,’ the teen’s mother wrote in the application for the motion.

Boberg has been charged with two counts of fourth-degree sex offense for having a sexual contact with a person while in a position of authority.

She has also been charged with consuming alcohol on public property.

Boberg has been barred from having any more contact with the victim and has been ordered to stay away from his mother's place of employment. Boberg pictured above in old social media photos

Boberg plans to plead not guilty to the charges, her attorney said on Wednesday

Boberg appeared in court for the first time on Monday and was later released of her own recognizance.

Her attorney Peter O’Neil told the New York Post on Wednesday that his client intends to plead not guilty against the charges.

Boberg has taught as a substitute teacher at several schools in the Anne Arundel County District since 2016, officials revealed, but she was fired immediately after the allegations came to light and has also been banned from teaching.

This is the first time she has been accused of inappropriate relations with a minor. There is no evidence of any other victims, spokesman for the district Bob Mosier said, adding that: ‘People who would prey on children simply have no place in our school system.’

Fourth-degree sex offense is a misdemeanor punishable by up to a year in jail. It also requires registering as a sex offender. She could face up to two years in prison, if found guilty of both counts.

Detectives executed a search warrant of the teacher's home on June 5 and found 'relevant items' and took them into evidence.

Police encourage any further victims or anyone with information to call the Child Abuse Unit at 410-222-4733. If a person wishes to remain anonymous, they can call the Tip Line at 410-222-4700.