Mary Beth Haglin, 24, was a substitute teacher at Washington High School in Cedar Rapids, Iowa when she reportedly fell in love with a teenage student.
"I love you so much my empress," read one of the notes, reportedly. Another was a doodle of a heart.
From love notes on his behalf to racy selfies from her, the ex-teacher allegedly responded to the romantic gestures by sending the student explicit images of herself in her underwear. Reports claim that things soon turned more physical.
Haglin told Inside Edition, which is an American news-magazine broadcast for CBS, that she and the 17-year-old used to have sex in her car next to a public park during the six months.
However, her 'relationship' with the teen reportedly came crashing down after the pair were caught by a fellow pupil at the school.
In July, after being caught in the act, Haglin turned herself into the authorities and was charged with sexual exploitation of a minor in US law.
In light of the six-month illegal affair, Haglin now faces up to a two-year jail sentence.