WATCH: Duck Dynasty’s Family Patriarch Phil Robertson Recently Discovered He Has a 45-Year-Old Adult Daughter from Extramarital Affair Before He Became a Committed Christian

Phil and his family | A&E

The Duck Dynasty is bigger than the family thought.

Phil Robertson and his children Al, Jase, Jep and Willie revealed during the Unashamed podcast on Thursday that the family recently discovered the deeply religious patriarch has an adult daughter.

During the podcast, Al explained that he received a letter from a woman named Phyliss who was 45 and claiming to be his sister.

“So basically, it was from a woman who said that by a DNA search, she thinks that dad might be her dad,” Al said, adding that he had “dismissed” the letter at first because the woman’s birthday was after the time Phil had become a Christian in the 1970s.

From Sadie Robertson’s Instagram

Phil has previously admitted to being a philander prior to finding Jesus, however, it appears his daughter was conceived just before he devoted himself to the church.

Phil married his wife Kay, known as Miss Kay, in 1966. The pair remain married.

“Well once we get into that and start looking at it a little more deeply, I’m like, ‘Oh woah, woah… there might be something to this,'” Al said.

Al continued to say that he didn’t want to bring up Phyliss’ letter right away to Phil in case it wasn’t true.

“We both concluded, this is not one of those frivolous things we’ve got,” added Jase, who also received a letter from the woman.

“We had to pursue it,” Al agreed.

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SOURCE: PEOPLE, Ashley Boucher