Julio Gallo, 79-year-old co-owner of the world's largest winery and one of the wealthiest men in America, was in stable condition Wednesday after a highway collision that killed a woman in the other car. Gallo and his 74-year-old wife, Eileen, were injured Tuesday as their car crossed the center line and struck another on the perilous, winding Pacheco Pass Highway about 80 miles south of San Francisco, the California Highway Patrol said. Investigating officer Tom Melden said an early probe of the wreck indicated Mrs. Gallo was driving and that the accident was her fault, but no charges were immediately filed. Alcohol did not appear to be a factor, he said. Gallo is president of the $1 billion-a-year, privately owned E&J Gallo Winery of Modesto; his brother, Ernest, is its chairman. The accident killed 27-year-old Sharon Kauk of San Jose, the Santa Clara County coroner's office reported. Her husband, Timothy, and 3-month-old son, Matthew, were airlifted to a Santa Clara Valley Medical Center. Kauk was listed in stable condition Wednesday with minor injuries, which weren't disclosed, said Medical Center spokesman George Pavicich. Matthew, who had been in a seat restraint, was in serious condition with undetermined injuries, he said. The child had earlier been reported unhurt. The Gallos were admitted to San Jose Medical Center. He was listed in stable condition Wednesday, upgraded from guarded condition, and she was under observation and being treated for a hand injury. Last October, Forbes magazine listed Julio Gallo as the nation's 283 richest man. In 1933, with $5,900 of pooled money, he and his brother started making wine with a library recipe. Today, with Julio as master winemaker and Ernest as the marketing chief, E&J Gallo bottles some 250,000 cases of wine a day and sells nearly 27 percent of the wine in the United States. Sixteen brands carry their logo. Gallo spokesman Dan Solomon said Ernest Gallo had been informed of the accident but had no comment.