A south St. Louis woman's good deed sparked a brutal beating that landed her and her boyfriend in the hospital, police say.The 34-year-old woman told authorities she was home about 6:10 p.m. on Sunday in the 3700 block Virginia Avenue when she saw a group of males harassing a teenage girl who lives nearby in their Gravois Park neighborhood. The woman says she shouted at the men to stop.
But another woman in her 30s showed up moments later and argued with the woman and her boyfriend, police say.…