Former President Bush has spoken at length about his close ties to former President Bill Clinton, at times calling him his "brother from another mother."

CNN's Candy Crowley asked Bush during an interview published Friday where that leaves Hillary Clinton: "My sister-in-law!" the president responded light-heartedly.

When asked about a potential Jeb Bush versus Hillary Clinton 2016 presidential campaign, the former president conceded they would both be formidable candidates but insisted his brother — his real brother — would win.

"I think he'd beat her," he told Crowley. "Absolutely."

The Texas Republican has publicly prodded his brother Jeb Bush, who is the former governor of Florida, to enter the 2016 presidential contest. Brother Jeb says he is thinking over the possibility but is hesitant to enter the race because of the personal toll a rigorous campaign could take on his family.

Hillary Clinton has also publicly declared that she is considered throwing her hat in the ring but has not come to a decision yet, despite early signs that a campaign infrastructure in Clintonland is developing.