SAN FRANCISCO -- The San Francisco District Attorney's Office has filed charges against 30-year-old driver who struck two 12-year-old boys as they crossed the street in the city's Marina district Wednesday morning.Kristen Andereck, 30, of San Francisco, has been charged with one count of felony DUI with injury, one count of driving with a blood alcohol concentration of .08, and two counts of child endangerment with allegations of great bodily injury with enhancements, according to district attorney spokesman Maxwell Szabo.Andereck was arrested on suspicion of DUI after she struck the two boys at about 8:30 a.m. near Buchanan and Bay streets, according to police.The boys suffered life-threatening injuries, but are expected to survive, police said.Andereck was driving a white Volkswagen Tiguan SUV and stayed at the scene of the collision.According to yearbook records, Andereck attended St. Ignatius College Preparatory in 2001. in 2004, when Andereck was 19 years old, she was a debutante at a Cotillion event hosted by the Cotillion Club of San Francisco.Andereck also appears to have been a close family friend to the deceased comedian and Marin County resident Robin Williams, according to local media reports following his death by suicide last year.Andereck is currently out on $230,000 bail and will most likely appear in court on Tuesday at 1:30 p.m., Szabo said.