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.