A woman arrested for smashing three windows at a house turned on the officer who tried to comfort her in the police cells.
Donna Pleasance made threats to harm herself and was banging her head on the walls of the cell.
Paul Wood, prosecuting, said PC Karen Irving spent some time trying to assist her, which included putting a mattress on the floor to make her more comfortable.
He said Pleasance “worked up some spit in her mouth” and spat at PC Irving, hitting her in the eyes and face.
Mr Wood said Pleasance then told the officer: “I know which school your daughter goes to – I hope your kids can look after themselves otherwise they will end up in the cemetery.”
The windows at the house in Winsover Road, Spalding, belonged to Louise Kenney and one that Pleasance smashed had an estimated value of £100.
Mr Wood said Pleasance turned up at about half-past midnight on March 30 and Miss Kenney was awoken by her shouts.
Miss Kenney and another witness saw Pleasance pick up a bin and throw it at the front door – she threw a brick at the kitchen window and then broke a third window.
Pleasance (31), of Bear Lane, Pinchbeck, was ordered by Spalding magistrates to pay £100 compensation to PC Irving and conditionally discharged for two years.
She pleaded guilty to assaulting PC Irving and criminal damage.
Solicitor Andrea Wilkes, mitigating, said Pleasance had been through a traumatic time over a family matter and was taunted about that when she went to the house in Winsover Road.
She said: “Miss Pleasance is deeply ashamed of her actions on the night in question, especially towards the police officer and wishes to convey her apologies to the police officer through the court.”