The two girls read their victim impact statements to the court today, with both emotionally describing the damage Kupa's offending has had on them.
One girl said she felt guilty about the offending and had trouble sleeping, often waking up from nightmares. Both said Kupa was supposed to make them feel safe, but they felt scared.
The mother of one of the abused girls said she felt guilt for what had happened and no longer trusted CYF as her daughter was supposed to be safe in its care.
Justice Raynor Asher said the sexual offending was serious and involved a huge breach of trust, not just the trust of the children, but CYF and the community that had expected him to provide a safe home for the vulnerable children.
Justice Asher said a starting point for sentencing on the sex offences was 15-and-a-half years' imprisonment. The rape and unlawful sexual connection charges have maximum terms of 20 years.
But after taking into account aggravating and mitigating circumstances, including Kupa's previous good character, the judge came to an end term of 14-and-a-half years' imprisonment on the rape and unlawful sexual connection charges.
Kupa was given seven-year terms for the attempted rape and attempted unlawful sexual connection charges and one month for each of the assault charges. All terms were to be served concurrently, meaning a total end sentence of 14-and-a-half years' jail.
Justice Asher also imposed a minimum jail term of seven years and three months' jail before Kupa would become eligible for parole. Kupa sat or stood quietly in the dock during sentencing.