Joe Biden, Hallie Biden, Hunter Biden

Vice President Joe Biden kisses Hallie Biden, the widow of his son, former Delaware Attorney General Beau Biden, before his funeral services, Saturday, June 6, 2015, in Wilmington, Del. Also pictured is Beau Biden's son, Hunter, bottom left, and brother Hunter, top left. Beau Biden died of brain cancer at age 46.

(Patrick Semansky | AP)

Former Vice President Joe Biden's son is reportedly dating the wife of his other son.

Page Six reports Hunter Biden, 47, is in a romantic relationship with Hallie Biden, the widow of former Delaware Attorney General Beau Biden. Beau, Hunter's older brother, died in 2015 after a battle with brain cancer.

Hunter Biden, a lawyer, told the publication he began dating Hallie after splitting from his wife, Kathleen. They are still legally married and have three children together: Finnegan, Maisy and Naomi.

"Hallie and I are incredibly lucky to have found the love and support we have for each other in such a difficult time, and that's been obvious to the people who love us most. We've been so lucky to have family and friends who have supported us every step of the way," Hunter said in a statement.

The New York Daily News reports Hunter Biden was previously suspected of infidelity several years ago when his name was among those leaked in the Ashley Madison hacking scandal. He said it was not his account on the dating site for affairs, and accused someone else of using his name.

According to People magazine, his father and wife Dr. Jill Biden have given their blessing to the new couple.

Sen. Joe Biden, second from left, listens to presidential candidate, Sen. Barack Obama, at the Democratic National Convention at Invesco Field in Denver, Thursday, Aug. 28, 2008. At left is Jill Biden; at right is Beau Biden and second from right is Beau's wife Hallie Biden. (AP Photo/Charlie Neibergall)

"We are all lucky that Hunter and Hallie found each other as they were putting their lives together again after such sadness. They have mine and Jill's full and complete support and we are happy for them," Joe Biden, a Syracuse University College of Law alumnus, said in a statement.

When Beau died nearly two years ago, he left behind two children with Hallie: Natalie, 12, and Hunter, 10. Beau, also an SU alumnus, served in Iraq as a major in the Delaware National Guard and was the state's attorney general from 2007 to 2015.

"Beau Biden was, quite simply, the finest man any of us have ever known," his father said in a statement after his death.

The former VP later said Beau's death was a large reason for his decision not to run for president in 2016.

Joe Biden married Neilia, the mother of Beau and Hunter, in Skaneateles in 1966. Neilia and their one-year-old daughter Naomi were killed in a car crash in 1972. Joe remarried five years later with Dr. Jill Biden in New York; their daughter Ashley was born in 1981.

Update: TMZ reports Kathleen, Hunter's wife, filed divorce documents in late 2015. She says she asked him to leave on July 5 that year "due to his conduct the night before," but does not elaborate.

She's seeking sole physical and legal custody of their one minor child; their other two kids are adults.