A high school teacher from Florida has been arrested for allegedly continuing a sexually explicit conversation with a Texas teen, even after she was made aware that the boy was not 19 but 15-years-old.

Robin Dunlap, the 27-year-old Haines City High School teacher in Haines City, Florida, had voluntarily turned herself into the Winter Haven Police Department on 19 September, when she learned from the boy's mother about his real age.

Dunlap told police officials that she had been sending her nude photographs as she was led to believe that the boy, whom she met through Xbox Live online gaming service, was 19-years-old.

The conversation between the two moved to other channels as it became more sexual in nature.

After discovering the explicit photos and text on her son's phone, the victim's mother reportedly confronted Dunlap over the phone. Soon after that, Dunlap decided to turn herself in but things didn't end there. According to the Winter Haven Police department, on 29 October, almost a month after her confession, officials received news that Dunlap had continued to exchange messages with the victim via Google Hangout.

After receiving the information from the boy's father, investigators went to her home and confronted Dunlap about the conversation on Sunday (17 December), which she didn't deny. In fact, explaining her reasons, she told officials that "he is the only person that she can talk to and the only one who understands her."

Dunlop even gave her consent to the investigators to look into her phone, which revealed text exchanges that slowly progressed to extremely explicit language. The high school teacher has since been arrested on charges of Transmitting Material Harmful to Minor and for using an electronic device to commit a felony.

"There is absolutely no excuse for an adult - especially a high school teacher - to continue sexually explicit conversations with a 15-year-old long after his real age is revealed," Chief Charlie Bird said.

"The vulnerable age of this victim and the fact that this woman took advantage of him for her own personal needs is inexcusable."