(CNN) It was just a few days before her baby shower, and Sara White was bleeding inside a garage. When police tried to help her, it kicked off a hail of gunfire and an hourslong police standoff.

When it was over, White, a registered nurse who was eight months pregnant, and her 16-year-old son, Arkeyvion White, were found dead at the home in Stockbridge, Georgia.

"We don't know how we're going to do it," White's mother, Kathie White, told CNN affiliate WSB . "We were looking forward to holding another grandbaby."

The family had been planning a surprise baby shower this weekend, Kathie White said. Now, they'll be planning funerals.

Police were called Thursday morning to a home after some "sort of domestic dispute," according to the police department in Henry County, just south of Atlanta.

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