Fairfield police arrested an 18-year-old woman Thursday afternoon on suspicion of stabbing her boyfriend in the chest with a knife.Yiyi Dou, also known as Janet Stevens, was arrested for assault with a deadly weapon and domestic violence and was booked into the Solano County Jail, Sgt. Joel Orr said.Police received a call about a stabbing victim around 2 p.m. from a surgery clinic on Martin Road, Orr said. The 20-year-old man, who was driven there by his girlfriend, was found inside a vehicle in the parking lot. Police found he had been stabbed in the chest with a knife and he was flown to a medical center for treatment where he is listed in stable condition, Orr said.Police found Dou in the parking lot and learned she had stabbed her boyfriend during an argument in her house on Silvercrest Drive two miles from the clinic, Orr said. She then drove the victim to the clinic.