Lindsay Lohan has a half sister!

Michael Lohan submitted to a DNA test on an episode of “Trisha Goddard”, and found out that he fathered an illegitimate child back in 1995, WHILE he was still married to Dina Lohan.

Michael agreed to have the results of the paternity test read on air, where he came face-to-face with his 17-year-old daughter for the first time. The results came back POSITIVE!

The girl’s mother — Kristi Horn — has claimed Michael was the father for years, and has even tried multiple times to get him to pay child support … but Michael adamantly denied the allegations.

The reveal — which airs tonight — is cringeworthy … Michael can’t believe the news … and the girl’s mother immediately bursts into tears.

After, Michael gets up to hug his newfound daughter (Ashley) and she resists, shouting, “No! No! No!” while Michael pleads, “I just want to hug you.”

FYI … Michael’s two youngest children with Dina — Ali and Cody — were born in 1993 and 1996 respectively. Which means Ashley was conceived somewhere in the middle.

Congrats, Lindsay. You got a new half-sister.

Man, what would YOU DO if you just found out Michael Lohan was your father, or better yet that Lindsay was your half-sister!? Oh man, can you imagine! I would die.