Lindsay Lohan is rumoured to be having a lesbian affair.The 'Mean Girls' star - who is currently in Japan for a fashion shoot - is said to be more than just friends with DJ Samantha Ronson, who has accompanied her on her trip.Former publicist Jonathan Jaxson wrote in his blog at jonathanjaxson.blogspot.com: "Lindsay actually has always been quite open. Maybe she was tired of the boys and that is why she decided to spice it up with BFF (best friend forever) Samantha Ronson."Now I would have no bad things to say about either if Samantha wasn't deeply involved in alcohol and drugs. Not the best influence for a rehabbed Lindsay Lohan."Jaxson claims Lindsay and Samantha's fledgling same-sex romance has been confirmed by his sources.Lindsay, 20, arrives in London next month to begin shooting 'The Best Time of Our Lives' - a biopic about the love life of poet Dylan Thomas - alongside Keira Knightley.