Michael Lohan is confident he's not facing his very own parent trap.

Lindsay Lohan's dad tells E! News he provided a DNA sample for a paternity test this morning and is now convinced that the results will shoot down a woman's claim that he fathered a daughter with her while he was separated from ex-wife Dina Lohan.

On Friday, the 48-year-old Lohan patriarch acknowledged having sexual relations on two occasions with Kristi Kauffman, a woman he met in Houston in the mid-'90s.

He said he initially believed Kauffman's claims that her daughter, Ashley, was his, but now Lohan says the math doesn't make sense.

"We were together in July of '94. I think it was just before The Parent Trap came out because that's when Dina and I were separated," he tells E! News. "[Kristi] left me and went to Houston, Texas, and she met a guy she lived with there for a year."

According to his time line, Lohan says, Ashley, now 13, was born in June 1995—a difference of 11 months—which is why he ran out to get this test done right away.

"She had me so convinced. She had me snowballed," he says, adding that he even communicated with the girl he believed was Lindsay's secret sis by telephone, even helping her with her homework.

"Here I was sitting in jail going through a divorce, felt like I had no hope and then someone sends me a letter and says I have a baby. And I thought maybe this is what I'm supposed to do next," he says.

The results of the paternity test will be ready in 10-12 days and should settle the matter, he says.

If he is proven to be Ashley's father, he tells E! News he is prepared to make good, and will finally have a face-to-face with her.

"Then I'll sit down and meet with my kids. Let my kids decide if they want to meet her and when," he adds.

On Friday, Kauffman, a 44-year-old massage therapist, told E! News that Lohan promised "to do for Ashley what he did for Lindsay’s career, the whole thing," but then had second thoughts.

"He was supposed to take a paternity test seven years ago , but he disappeared off the face of the earth," she said. "I just want this to be resolved and the truth to be told."