Hefner's son attacks Playmate of the Year

Claire Sinclair was crowned Playmate of the year last year

Hugh Hefner's oldest son was busted for allegedly attacking his girlfriend, former Playmate of the Year Claire Sinclair.

Marston Hefner, 21, reportedly kicked Claire, 20, and punched her in the stomach, according to TMZ.

Police were called to the apartment that the couple shares in Pasadena, California after receiving worried calls from Claire's family.