A psychologist asked her flatmate to strangle her whilst having sex - and she died.
32-year-old Juan Javier Jonathan Ruiz claims Tania Trinidad Paredes, 23, asked him to use a cable to slap her whilst they were having intercourse.
Paredes was found dead in Ruiz's house in Mexico City and is being held by police.
Ruiz also claims that the young girl had suggested he have a threesome with their friend Jose Luis Arzate Martinez.
And he also claims when he declined she wanted to have a hardcore sex session using the cables as bondage.
According to Metro newspaper, Ruiz said: "During the act, she asked me to squeeze her neck and slap her because she liked violent sex."
The cause of death was reportedly asphyxiation and she suffered broken neck bones.
An investigation into the death of the girl is still underway.