It appears that LiLo has a step-sister named Ashley. According to Life & Style, Michael Lohan had an affair with Kristi Horn in the early ’90s while separated to Dina Lohan. In December 2008, Michael Lohan was supposed to appear at a DNA testing but didn’t and thus a judge ordered Ashley’s birth certificate to include Michael Lohan’s name. Also, Kristi tells the publication that Michael Lohan owes $300,000 in back child support.
The publication mentioned that Michael Lohan denies being Ashley’s father and Kristi is willing to take a DNA test to prove that he is Ashley’s father.