Who is this person "close to" Pete Hegseth's family who leaked a private email between a mother and a son and HOW DID THEY GET the private email?

"The claims were based on the reporting of The New York Times. On Nov. 29, 2024, the newspaper ran an article with the headline "Pete Hegseth's Mother Accused Her Son of Mistreating Women for Years." The reporter obtained a copy of an email from an unnamed source close to the family. It was reportedly written by Hegseth's mother, whose first name is indeed Penelope. The New York Times published the entirety of the email, with just one line redacted for privacy."

https://www.yahoo.com/news/fact-check-hegseths-mother-accused-005200776.html