Jason Aldean's wife, Brittany, was on hand for his performance at the Route 91 Harvest Festival in Las Vegas on Sunday (Oct. 1) when a mass shooting took place, and in a new social media post, she admits she feared she might not live to ever meet the child they're expecting.

Aldean was in the middle of his headlining set at the country music festival on Sunday when 64-year-old Stephen Paddock opened fire into the audience of 22,000 from his hotel room above the crowd, killing at least 58 people and wounding more than 500 others. Aldean was forced to flee the stage.

In a new post to Instagram on Wednesday (Oct. 4), Brittany says she was not at the stage with her husband, but in a tent closer to the hotel when the shooting started.

"As you can imagine my first instinct was to run to him and his was the same," she writes, adding that as they laid behind the equipment onstage with bullets flying by, all she could think, was, 'I never even got to hold my baby.' The couple are expecting their first child, a son, around the holidays.

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She thanks first responders on the scene for their work, adding that since she and Aldean's road family are all safe, they are "the lucky ones."

"I can't put into words the pain and heartache we feel for the ones who are no longer with us," Aldean writes. "May God be with their families and friends during this horrendous time. Each and every one of you are and will forever be in our prayers."

Jason Aldean turned to social media on Tuesday (Oct. 3) to implore Americans to come together and "stop the hate," sharing his own fears for his kids. He has daughters from his first marriage.

“This world is becoming the kind of place I am afraid to raise my children in," he writes.

Aldean has canceled his next three tour dates scheduled for the coming weekend out of respect for the victims in Las Vegas.

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