Playboy Playmate Claire Sinclair Gets Restraining Order Against Hugh Hefner’s Son

Playmate Claire Sinclair has obtained an emergency restraining order against Hugh Hefner“s son Marston Hefner — after he allegedly beat her up last night during a heated argument.

Claire just left the Pasadena Police Department, where officers interviewed her about the incident — and we”re told police granted a 3-day stay-away order against Marston to give Claire time to move her stuff out of his place.

In the video, Claire says it”s a 5-day restraining order — but law enforcement sources tell us, it”s just 3.

Claire tells , she plans to move out asap — but if she needs more time … she”ll have to go to court to extend the protective order. 

Claire says she called Hugh after the incident who expressed sympathy — claiming he was very disappointed by the situation.

broke the story … Marston was arrested around 11:15 PM last night for misdemeanor domestic violence after police responded to a 911 call from Sinclair”s family — and observed several injuries on the model”s body.

Marston — who has been dating Sinclair on-and-off since August 2010 — admitted the two had gotten into an argument, but didn”t cop to hitting her. He has since been released on $20,000 bail.