As we told you yesterday, Lindsay Lohan in a rambling blog post told the world that her father Michael Lohan had cheated on her mother and sired a girl which he kept secret from the family. Lindsay Lohan’s post says that Michael told the family about their new sister in time for Christmas.

my father just let my family and i know, amongst others that he had another child after my little sister Aliana, or maybe he had it before Aliana?? either way, he cheated on my mother and that really sucks… MERRY CHRISTMAS!!! wow- do i sound like “debbie downer” or what? not trying to be…

Michael Lohan hit back almost immediately strongly denying the claim that he had an affair or has an illegitimate daughter. Then he went on the attack saying

there is a “99 percent chance” Lindsay’s MySpace message was actually written by her girlfriend, Samantha Ronson.

Your serve Lindsay/Samantha.