Marston Hefner, son of playboy founder Hugh Hefner, as been sentenced to a 52-week domestic violence programme after allegedly beating his Playmate girlfriend Claire Sinclair last month. He was also ordered by the judge to stay away from her. 21-year-old Hefner was charged with corporal injury on a spouse or cohabitant after the February 12 incident when he allegedly kicked and punched Sinclair, last year’s playmate of the year.

He pleaded ‘no contest’ to the charge.

Hefner was also charged with vandalism over her damaged laptop, but that count was dismissed.

In the days following the alleged attack 20-year-old Clair Sinclair cleared her schedule of all Playboy-related events, including photo shoots, appearances, and events, according to TMZ.

Miss Sinclair said she wouldn’t press charges on her boyfriend if he apologised publicly and received psychiatric treatment.

The model told TMZ on February 14 that she was granted a five-day stay-away order so that she could move out of the apartment she shares with Marston Hefner.

Miss Sinclair was photographed with a large bruise on her arm while taking some of her belongings out of the Pasadena apartment.

Marston Hefner, 21, reportedly kicked Miss Sinclair and punched her in the stomach during a fight the couple had late last Sunday night.

Police responded to the residence after receiving worried calls from Miss Sinclair’s family.

Marston Hefner reportedly told police that the two had been arguing but that he had not physically injured his girlfriend.

Hefner was arrested for misdemeanor domestic violence but released on $20,000 bail.

Miss Sinclair was the Playboy official pin-up and Playmate of the year 2011.

Hugh Hefner told Fox News that Miss Sinclair’s style reminded him of Bettie Page – a popular 1950s pinup model who was also Playboy Magazine’s Miss January cover model in 1955.

Miss Sinclair has been dating Marston Hefner since August 2010.

She was born in 1991 in Los Angeles and has been modelling since the age of 14. 

She has taken part in fashion campaigns for Angel Jeans and stars on Playboy TV.  

She told Maximo TV last year that she and Marston Hefner had a ‘tumultuous’ relationship.

Marston Hefner’s mother Kimberley Conrad, is the ex-wife of Hugh Hefner and Playmate of the Year 1989. 

Ms Conrad was married to Hugh Hefner between 1989 and 2010.

Marston was born on April 9, 1990 and shares the same birthday as his father Hugh. 

He has a younger brother Cooper Bradford Hefner who was born on September 4, 1991.

According to his Twitter page, Marston Hefner is a philosophy college major who also studies business and writing. 

In an interview with GQ in 2008, then 18-year-old Marston said: ‘My, like, expectancy for what girl I’m going to get is, like, so f*****-up. 

‘I’ve just been around really hot women my entire life, so the average high school girl won’t do it for me.’

Elite.