A PORT CHARLOTTE WOMAN WAS ARRESTED WEDNESDAY AFTER ALLEGEDLY HAVING SEX WITH A 17 YEAR OLD BOY.  THE MOTHER OF THE BOY CALLED THE SHERIFF’S OFFICE MAY 23RD AND REPORTED SHE SAW MESSAGES AND A PHOTO ON HER SON’S FACEBOOK PAGE THAT LED HER TO BELIEVE AN ADULT FEMALE WAS HAVING SEX WITH HER SON.  MAJOR CRIMES UNIT DETECTIVES OBTAINED A SEARCH WARRANT TO COLLECT EVIDENCE AT THE WARWICK STREET HOME OF 34 YEAR OLD AMY VARNUM.  THE DETECTIVE’S INVESTIGATIVE REPORT SAID VARNAM AND THE BOY HAD SEX ON TWO OCCASIONS IN HER HOME.  SHE WAS ARRESTED AND CHARGED WITH SEXUAL ASSAULT ON A MINOR.  SHE REMAINS IN THE CHARLOTTE COUNTY JAIL ON A $20,000 BOND.