On February 2, Kryszkiewicz was drinking with a friend in Whakatane before she drove back to Tauranga.
After buying $5 worth of petrol at the Gull service station in Hull Rd she headed to Blake Park where she parked and poured the petrol into a small drink bottle.
She then drove to Miro St, parked approximately 100m from the flat, walked inside the apartment, entering the bedroom she and the grandson had shared, and sprayed petrol around the room before setting it on fire.
The fire rapidly spread through the majority of the upper level of the house.
Kryszkiewicz then fled the apartment, ran back to her vehicle and drove off.
Neighbours alerted the fire servicebut the upper level of the house was extensively damaged.
When spoken to by police Kryszkiewicz admitted setting the fire, and said she had done so because the relationship had soured and it was the only way she could get back at the grandson.
She also conceded she knew other people lived in the apartment block but she was confident the fire would not spread to their apartments due to concrete walls that separate the flats.
Kryszkiewicz's lawyer Tony Balme told Judge Peter Rollo that he would be seeking a restorative justice meeting referral.
Judge Rollo, who agreed to further remand Kryszkiewicz on bail, called for a reparation report with the pre-sentence and restorative justice meeting reports.
