Newark, N.J. ? This could be the week that Marie Romero will look Charles Cullen straight in the eye and tell the former nurse and admitted serial killer how much pain he caused by killing her sister.

Romero’s sister, Catherine Dext, was killed with an injection in June 1996 at Hunterdon Medical Center, where she had been admitted with a ruptured spleen.

A sentencing hearing is scheduled Thursday in Newark for Cullen, who pleaded guilty to 29 murders and six attempted murders during his 16-year nursing career in New Jersey and Pennsylvania. Cullen, 44, has told investigators he might have killed as many as 40 people, but authorities say that estimate appears to be inflated.