Mother-of-two middle school teacher, 35, accused of performing sex acts on her 14-year-old male student Mysti Moriah Lingenfelter facing charges of lewd acts on a child and oral copulation with a person under 16 Lingenfelter has been under scrutiny since May when allegations of sexual impropriety first came to light The 35-year-old is accused of performing sex acts on one of her students at Foothiil Ranch Middle School in California in 2011-2012 By Snejana Farberov For Dailymail.com Published: 11:13 EST, 10 December 2015 | Updated: 11:13 EST, 10 December 2015 Bad teacher: Mysti Moriah Lingenfelter, 35, is facing charges of lewd acts on a child and oral copulation with a person under 16 A California middle school teacher has been arrested for allegedly performing sexual acts on a 14-year-old male student. Mysti Moriah Lingenfelter, 35, of Fair Oakes, turned herself in to police custody on Tuesday to face charges of lewd acts on a child and oral copulation with a person under 16. According to the Sacramento County Sheriff's Office, Lingenfelter, who is employed as a teacher at Foothill Ranch Middle School, has been under investigation since May. Detectives say Lingenfelter had carried on an inappropriate relationship with one of her students during the 2011-2012 school year, reported the Sacramento Bee. Lingenfelter, who is currently out on $50,000 bail, has been placed on administrative leave. Her arraignment is scheduled to take place on December 15. At least one of the sexual encounters between Lingenfelter and the 14-year-old boy took place at the middle school and another occurred on a camping trip, according to a criminal complaint. Tony Turnbul,, of the Sacramento County Sheriff's Office, told the station KCRA that investigators first learned of the allegations against the middle school teacher when someone came forward with the information on behalf of the victim. +2 Lingenfelter is suspected of performing sex acts on one of her male students at Foothiil Ranch Middle School in California (pictured) during the 2011-2012 school year +2 Lingenfelter, who has two young children of her own (pictured in this Facebook photo), has been on administrative leave since May The boy in question no longer attends Foothill Ranch Middle School. Lingenfelter, who is a single mother of tow young children, was hired by the Twin Rivers Unified School District in 2005. According to reporting by Sacramento Bee and information found by Daily Mail Online on the site Meetup.com, Lingenfelter also has side business selling aromatic oils.