"That means she was eight months pregnant. The baby is going to come into the world no matter what. You can just be supportive about it."
"The families on both sides are going to be very supportive about it."
According to reports in The Sun newspaper the girl became pregnant while at primary school, shortly after beginning a relationship with a 13-year-old boy who lives near her home in London.
The couple have the lowest combined age of any British parents in history.
A source told the newspaper that both sets of grandparents were supportive and that the couple intend to stick together and raise their child.
"They're very into each other, totally in love. She is obsessed with him. She sees this as true love. They want to get married," the source said.
According to reports the 12-year-old girl, who currently lives with her mother - who at 27 is the UK's youngest ever grandmother, will return to school in September.
At 12 years three months, the girl is five months younger than the nation's previous youngest mother Tressa Middleton who gave birth in Edinburgh aged 12 years eight months in 2006.
- UK Independent