Marston Hefner's Alleged Victim I'm QUITTING Playboy ... For Now

2/18/2012 4:30 AM PST

Marston Hefner's Alleged Victim Claire Sinclair -- I'm QUITTING Playboy ... For Now

The Playmate who was allegedly kicked and beaten by Hugh Hefner's son Marston is disassociating herself from Playboy ... at least for the foreseeable future -- TMZ has learned.

Sources close to 20-year-old Claire Sinclair tell us, the model has canceled all future Playboy-related appearances, events, and photoshoots pending the outcome of her domestic violence case with Marston.

Claire has even lawyered up with powerhouse attorney Keith Davidson -- who tells us, "We are taking this matter extremely seriously and we are completing a thorough investigation into this situation."

TMZ broke the story ... 21-year-old Marston was arrested Sunday night after allegedly kicking and punching Sinclair during an argument in their Pasadena, CA apartment.

Sinclair said she wouldn't press charges against him if he gave a public apology -- and got psychiatric help. The incident is currently under investigation.