Came across this news story from Oklahoma

Demarray Love, 8, helped his mother, Kimberly Tennyson, deliver his newest baby brother.
"I just went into labor and he came within 15 minutes,” Tennyson said.
Tennyson said it was 2 a.m. Saturday when she felt she was close to giving birth. She called her grandmother Nadine Rogers to come and help her, but Rogers never made it in time, because the baby was born 15 minutes after the contractions.
Tennyson said there were no doctors nor nurses in their house, just her 8-year-old son.
"He did everything. He didn't panic," she said.
While Rogers walked her through the labor over the phone, Love was helping deliver his newest little brother.
Both mom and baby are reportedly doing fine.