A teacher faces jail after admitting having sex with a student in her car while it was parked up in public.

The now-former high school chemistry teacher has admitted to a charge of having sex with an underage pupil.

Tiffany Geliga pleaded no contest on Wednesday to one count of sexual relations with a minor, reports WPTV.

It is said he was 17 at the time - the age of sexual consent in Florida is 18, but can be slightly lower if the other party is a similar age and not in a position of responsibility.

The local news channel in St. Lucie County, Florida said the 36-year-old was a teacher in the St. Lucie County School district when she got involved with the student last May.

Geliga could have faced up to 15 years in jail, but thanks to striking a deal with the prosecution, now faces a 10-year maximum.

She also had to surrender her teaching license, the station said.

According to CBS12 at the time of arrest, Geliga was picked up for ‘inappropriate activities with a 17-year-old male student.’

And NBC 26 said it came to light ‘after school administrators at Port St. Lucie High School told a school resource officer that they had spoken to a 17-year-old student who told them he had relations with Geliga.’

That happened because another boy’s mother had been in touch.

The abused teenager later told school officials he had sex with Geliga twice in her car, according to NBC 26, and that it happened in late April or May 2017.

She was caught when police set up a sting operation and ‘conducted a controlled call between the teacher and teenager which confirmed that the pair had sexual relations,’ according to NBC 26.