A project manager pushed his stepdaughter onto a bed when she tried to intervene in an argument between him and his wife.
Andrew Dunstan sent her flying backwards causing her to bang her head on a bedside cabinet and suffer a slight scratch.
Dunstan, 53, of Kevin Avenue, Poulton, pleaded guilty to assault.
He was fined £500 with £85 costs and ordered to pay his stepdaughter £50 compensation plus £50 victims’ surcharge by District Judge David Noble, sitting at Blackpool Magistrates’ Court.
Dunstan was also made the subject of a two-year restraining order which prohibits him from contacting his wife and stepdaughter or entering their home road in Thornton Cleveleys.
Prosecuting, Eddie Harrison, said the 24-year-old stepdaughter said Dunstan was drunk and being abusive and threatening to her mother on February 20, about 10.30pm. When she tried to intervene, Dunstan pushed her.
Martin Hillson, defending, said there had been marital problems between Dunstan and his wife for some time.
The night of the offence Dunstan and his wife argued over the volume at which he had the television. Since the offence, he had left the family home and divorce proceedings had started.