Sisters Jenna Bush Hager And Barbara Bush Talk Close Bond And New Book

The Bush twins are opening up about their dynamic sisterhood!

Jenna Bush Hager and Barbara Bush first gained recognition for being the daughters of the 43rd president of the United States, George W. Bush.

Now, the fraternal siblings want the younger generation to realize the importance of having a sister in their new children's book, "The Superpower Sisterhood."

During an exclusive sit-down with ET Online, the Bush girls got candid about their new book, explaining the reasons behind the sisterhood-centered story.

Unlike typical interviews, the sisters took the wheels of the discussion by quizzing each other about their book and what sisterhood meant to them.

Opening up about "The Superpower Sisterhood," the former White House residents explained that the story followed the journey of a young girl named Emma.

As an only child, Emma grew up wishing for a sister, enduring this loneliness until the fateful day two sets of sisters relocated to her street and implored her to join their club.

This emotional rollercoaster marked the second children's book the twins wrote together, and the inspiration for their story came from their mother, Laura Bush.

Taking the lead, Barbara revealed that the main character of their story was created based on the former First Lady. The 40-year-old said, "Well, in this new children's book, our main character is named Emma, and she's an only child, which might seem unusual for a book on sisterhood, but Emma's based on mom."

The Dallas native continued, "Mom, as you know, was an only child, and she desperately wanted siblings, and she never had any blood siblings."

Like Emma's story, the former First Lady of Texas became best friends with a group of girls who remained close to the 75-year-old over the years. In Barbara's words, these women were her mother's "chosen sisters."

Although none of the book's characters had superpowers like comic book heroes, the girls were given exceptional special skills and talents.

These abilities grew stronger when the group joined forces, showcasing the importance of a sisterly bond. Barbara noted that sisterhood did not always spawn from blood connections. In her words,

In Superpower Sisterhood, that's what happens with Emma. These other sisters move on her block, and even though they're not her blood sisters, she becomes an honorary sister in their sisterhood club.

On the topic of superpowers, Jenna could not help to sing her sister's praises for being incredibly gifted when it came to mathematics.

The "Today with Hoda & Jenna" co-host said, "Your superpower as a kid is that you were incredible at math. As you very well know, you won the Dallas City Math Championship."

"Well, I came in 9th," the Global Health Corps co-founder corrected her sister, to which Jenna replied, "9th in the city is better than not even entering."

The pair went on to discuss their superpower as sisters, stating that being together from birth made navigating life's trials a lot easier than being alone.

"I think we've always been more powerful together because we've never not had someone walking alongside us," Barbara explained, adding that the twins' could always depend on each other no matter the situation.

Last September, The Blast reported that Barbara welcomed her first bundle of joy alongside her husband, Craig Coyne, who she married in October 2018.

Taking to Instagram, the proud aunt blessed fans with an introduction to her niece Cora Georgina in a series of heartwarming snaps.

In the first picture, the fraternal twins were captured affectionately gazing down on the baby, who was wrapped safely in a blanket while tucked in her mother's arms.

Jenna kept her niece's identity a secret by blurring Cora's face in the photo. The precious angel was also seen receiving love from her parents and aunt in the other slides.

The "Southern Living" Magazine editor revealed in the post's caption that the girl had arrived earlier than expected, noting that the infant had a "feisty" attitude.

The journalist also praised her sister for enduring the pains of childbirth, describing the activist as the "dearest and toughest mama."