SAN ANTONIO – A woman was taken to an area hospital and her adult son is in custody after he stabbed her during an argument early Monday morning, San Antonio police said. According to police, the son had been arguing with his mom over wanting the car keys when she decided to go to bed. That’s when, police said, she was stabbed by her son in the backside while she slept. Police said the son, a man in his 20s, was detained and is charged with aggravated assault. The woman was taken to an area hospital by EMS.