A Saskatoon woman is facing eight additional charges after a family of four was killed in a highway crash.

Catherine McKay, 49, is now facing four counts of dangerous operation of a motor vehicle causing death and four counts of impaired operation with a blood alcohol reading over .08 causing death.

McKay was already charged with four counts of impaired driving causing death.

Jordan and Chanda Van de Vorst and their two-year-old son, Miguire, and five-year-old daughter, Kamryn, were killed in a weekend highway crash in Saskatoon. (Van de Vorst family/Facebook) Jordan and Chanda Van de Vorst were killed early Sunday morning when their car was hit on Highway 11, on the outskirts of Saskatoon. Five-year-old daughter Kamryn and two-year-old son, Miguire, died later in hospital.

McKay made a brief court appearance on Tuesday, and is set to appear in court again on Thursday.

A memorial service will be held this weekend for the Van de Vorsts. The funeral will be held at Saskatoon's Elim Church at 11 a.m. CST on Saturday, January 9.