A Maryland mom's final act was trying to protect her sons with her own body after a private jet crashed into their home and erupted into flames, officials said.

The bodies of Marie Gemmell, 36, her infant and her 3-year-old son were found in the family's second-floor bathroom in Gaithersburg, Maryland, after the crash on Monday.

"The way they found them, it looked like she was trying to shelter them from the smoke and fire," Montgomery County Police Capt. Paul Starks told ABC News today.

"You think you're safe in your house," he said. "You have a baby six weeks ago and you're staying home. ... Unbelievable."