Lindsay Lohan’s troubled father has gifted her star daughter a 13-year-old half-sister. Apparently LILO’s father, Michael Lohan has a secret daughter with Kristi Kaufmann, with whom he had a short fling while he separated from his wife Dina Lohan.

Michael Lohan claims that he got to know about his secret daughter many years after he was born when he started exchanging letters with her mother last year.

He said, “She contacted me to say she had a paternity test done that revealed the child’s father was not her husband. She said I was the only other man she had been with.”

Michael also admitted that he spent almost a week with Christie.

He said,  “I met Christie in 1982 in Houston. In 1995, when I was separated from Dina, she contacted me that she was moving to Long Island.”

“She was going through a divorce at the time. I was with her for a week.”

But dad Lohan is not convinced about Christie’s claims and is sure that he is not the father of her teenage daughter and has hired lawyers to look into the matter.

He said, “My lawyers are dealing with this. When we find out the truth we will deal with it in the appropriate manner.”

Meanwhile Kaufmann revealed that her relationship with Lohan lasted more than a week, adding, “I just want to make sure the truth comes out. My daughter has a right to know who her father is - and it’s Michael.”

So do we see another Lohan soon on Lohans own reality show ‘Living Lohan’?

Lohan family is upset as David Letterman in a recent interview referred to Ali Lohan as ‘Lindsay’.

Ali Lohan made an appearance on David Letterman’s Late Show on Tuesday for promoting the new reality show, Living Lohan. During the interview David mistakenly called Ali Lohan as Lindsay, but the joke was well taken by Ali Lohan and she brandished it with a laugh.

But the joke has not gone well down with the Lohan family, as they believe Ali’s association with Lindsay mighty harm her reputation.

A source close to the family says,” It’s a sticky area because Ali’s rising star is both enabled and discredited by her sister’s notoriety. Ali doesn’t want to ride Lindsay’s coattails, and Dina has always believed Ali is a great talent in her own right.

“When he calls her Lindsay, it reminds everyone of how much she emulates her sister’s behavior — she’s basically adopted her voice and look. We can expect it will be hard for Ali to stay out of the tabloids,” added the source.

Only thing that we hope she doesn’t emulate is her sister’s crotch flashing antics.