Photography student Kristina Caban has been sentenced to five years in prison for branding Samir Sara, a former sex partner, with a big letter ‘R’ in his torso for never calling her back after they had sex.

A scorned woman launched a twisted attack against an old lover, when she allegedly lured him to a seedy Chelsea hotel where she had two thugs brand him with an “R” – because he never called her after they hooked up, police sources said.

Kristina Caban, 21, had a liaison with Samir Sara, 23, in 2004 – but she still burned so hot for him that she allegedly ambushed him last week and had her cohorts sear the 4-inch letter into the side of his torso, law-enforcement sources said.

Caban was assisted in the branding by Robert Testagrossa who also plead guilty last year for the hideous crime.