During a second day of evidence at Chester Crown Court, Alesha Ahmed spoke from behind a curtain so she could not see her mother and father, who are accused of murdering her 17-year-old sibling.
Shafilea's badly decomposed remains were found near a Cumbrian river in February 2004.
Ms Ahmed told police she saw her parents suffocate her older sister at the family's home in Warrington in September 2003, the court has heard.
Taxi driver Iftikhar Ahmed, 52, and his wife Farzana, 49, both deny killing their daughter. Read More