Sidwell Friends School is being sued for $10 million for allowing its staff psychologist to carry on an affair with the married mother of a 5-year-old student he was treating.

James Huntington taught sexual education to sixth-grade students in 2009-2010 — the same year that President Obama’s daughter Malia was in the sixth-grade at the elite Quaker private school — while having sex with Tara Newmyer, according to a lawsuit filed by her husband on Thursday morning.