A West Side woman who allegedly stabbed her elderly boyfriend to death because he was drinking her beer was ordered held Thursday in lieu of $500,000 bail.

Regina Williams, 55, of the 1000 block of North Waller Avenue appeared in Cook County Bond Court before Judge Israel Desierto, charged with first-degree murder in the slaying of Willie Anderson, 77, of the 2200 block of West Monroe Street.

About 6 p.m. Wednesday, the two were sitting in Anderson's car outside his home when Williams became angry that he was drinking her beer, authorities said. They began to quarrel, and Williams allegedly pulled a knife she carried for protection and began stabbing Anderson.

Anderson yelled for help, but Williams continued to stab him, Assistant State's Atty. Susanne Groebner told Desierto. google ads --> END google ads -->

Afterward, Williams got out of the car and called down the street to Anderson's nephew, saying, "You better come get your uncle—I just killed him," according to her arrest report.

Groebner said Williams got back in the vehicle and finished drinking her beer.

Williams is on probation for a 2007 felony conviction for aggravated battery. In that case she was convicted of spitting in the face of a Chicago Fire Department paramedic who was giving her medical treatment.

Williams has a history of mental illness, according to the Cook County public defender's office.

Her next court date was set for Aug. 26.