Somebody yelled out "Love you my brother, can't wait to see you,'' to Mr Davey as he was led from the dock.
Ms Morehu was supported by several young women as she left the court room.
She refused to speak outside as she was led to her car.
The jury took only a matter of hours to reach the not guilty verdicts.
Yesterday in a surprise change of plea, Hetaraka Reihana called out "guilty" before the registrar of the court could finish reading each of the charges laid against him.
The Crown's argument was that the trio had been drinking before they were involved in a race in which Reihana lost control of the vehicle he was driving and crashed into an oncoming ute driven by Brett McCready.
Reihana's lawyer, Panama Le'au'anae, told the court yesterday the guilty plea had come "at a very late stage" but the accused had now accepted responsibility for his actions.
Rerihana will be sentenced on May 31.
Crown prosecutor Greg Hollister-Jones claimed Reihana was not acting on his own. He said Morehu held influence over both Reihana and Davey as their aunt and set the pace in a race to the family urupa (graveyard).
Davey's lawyer, Paul Mabey QC, said there was no evidence to show that his client was racing either Morehu or Reihana to get to the urupa first.
Morehu's lawyer, Glen Dixon, said there was insufficient evidence to suggest she was party to a conversation about a race or that she encouraged one.