"It has to be kids, I had stuff like jewellery in my drawer but the only thing they took was my gold watch that the kids gave me."
Items stolen included laptops, an iPad, a wallet and a phone.
"I'm grateful they didn't trash the place, they came in, they took and they left. I'm thankful for that but I'm gutted for my dad. His phone and iPad were his lifeline."
Her father had only recently moved into her family home.
She said the experience had been "an eye-opener" and she was considering getting a dog to deter future burglars.
"Many years ago we had a Rottweiler, I think it's time we reinvested in another one. Dogs are a deterrent."
Mrs Nicholas was last month made an officer of the New Zealand Order of Merit for services to the prevention of sexual violence.
Her fight for justice in 2004 sparked public protests and the creation of Operation Austin to investigate alleged sexual offending by former Assistant Commissioner Clint Rickards and his ex-colleagues Brad Shipton and Bob Schollum.