Heidi and Chris Sawyer stand with their son, Layne, who graduated from Lewiston High School on Friday. On Sunday, the family welcomed their daughter and sister, Lynsey Mae Sawyer. (Submitted photo)

LEWISTON — On Monday, Chris and Heidi Sawyer were all smiles, proud parents of a Lewiston High School graduate and a 1-day-old girl.

Layne Sawyer of Lewiston holds his newborn sister, Lynsey Mae Sawyer, who was born early Sunday. Parents Chris and Heidi Sawyer were nervous she would go into labor and they would miss Layne’s high school graduation. (Heidi Sawyer photo)

Minutes after 18-year-old Layne Sawyer’s returned home from Project Graduation, Heidi went into labor.

Speaking from her bed at Central Maine Medical Center on Monday, she said she and her daughter were doing well.

“She’s perfect, perfect,” gushed Heidi, a well known community advocate and founder of the Lewiston Rocks Facebook page.

The baby is named Lynsey Mae Sawyer. She weighed 8 pounds, 10 ounces and was delivered early Sunday.

A few days before Christmas, Heidi, 39, and Chris, 43, found out they were having a second child. “It was a happy surprise,” she said.

Heidi said they were nervous about breaking the news to Layne, but “he’s been thrilled ever since.”

Her due date was June 4.

“That’s the same week of his graduation,” Heidi said. “We started panicking. Our biggest fear was missing out on his big day.”

She put everyone on notice not to call her Friday. “I didn’t want any stress,” she said

Lynsey Mae Sawyer was born early Sunday to Chris and Heidi Sawyer of Lewiston. Heidi went into labor minutes after their son, Layne, returned from the Project Graduation on Saturday morning. (Heidi Sawyer photo)

Chris and Heidi sat through graduation, snapping photos and cheering, joyfully watching their son walk across the stage to receive his diploma. “It was awesome!” she said.

On Saturday at 6 a.m. her son came through the door, back from Project Graduation.

“He sits down. We talked about graduation,” Heidi said.

At 6:30 a.m. her labor began.

“It’s like she (the baby) said, “‘OK I waited for you. It’s my turn.’”

Lynsey was delivered at 2:13 a.m. Sunday.

Big brother “is smitten,” Heidi said. “It’s going to be beautiful. He’s like an uncle/father/big brother of this little girl.”

Her husband is also delighted. Lynsey “looks just like her father,” Heidi said.

“We’re ready to go and start the next chapter,” she said Monday as they prepared to leave the hospital.

She will be on maternity leave with Manpower for eight weeks.