Another woman is coming forward claiming she had a long-term affair with Tiger Woods ... and to prove she means business, she's already hired herself a lawyer. TMZ has learned the alleged mistress -- that's number four on your scorecards -- claims this relationship didn't originate in Vegas, it started near Tiger's home in Orlando. The women -- a former VIP cocktail server (sounds familiar) -- has hired Orlando attorney Michael O'Quinn to address the media with her story very soon.