"Alcohol-fuelled madness" on a Tauranga road led to the deaths of two young teens on Christmas Day 2011, a court has been told.
Three relatives have each pleaded not guilty to two charges of manslaughter over the fatal crash.
Hetaraka Hikurangi Reihana, 21, and Haki Tepuere Davey, 18 are on trial at the High Court at Hamilton with 37-year-old Phillippa Vanessa Morehu for the deaths of the woman's two daughters.
Merepeka Morehu-Clark, 14 and her sister Brooklyn Morehu-Clark, 13, died near Tauranga on Christmas Day 2011 after the car Reihana was driving collided with a ute on Welcome Bay Rd.
The collision saw both sisters flung from the vehicle with Merepeka dying instantly when she hit a grass verge. Brooklyn, who was found trapped under the vehicle she was in, also died instantly.