Mere moments before a fatal plane crash Thursday in North Carolina took the lives of retired NASCAR champion Greg Biffle and his family, his wife Cristina Biffle sent her mother a heartbreaking text message that acknowledged their situation in three harrowing words.

“She texted me from the plane and she said, ‘We’re in trouble,’” her mother Cathy Grossu confirmed to People through tears Friday. “So we’re devastated. We’re brokenhearted.”

The early morning crash Thursday killed seven people in total, including 55-year-old Greg Biffle, his 35-year-old wife Cristina, their five-year-old son Ryder and Biffle’s 14-year-old daughter Emma, whom he shared with his ex-wife Nicole Lunders.

Grossu told People that Greg and Cristina Biffle were at her home just one day prior to the crash, confirming they were heading to Florida for a “birthday trip.” Greg Biffle was set to turn 56 next Tuesday.

“I don’t remember what the last words that I said to my daughter or to Greg or to my precious Ryder,” she told the outlet. “I don’t remember. I know we hugged, but I don’t remember those last words and that’s going to haunt me. But they were happy.”