King, 27, who is dating American music producer Jordan Omley, said she wants to have a big family, reported Femalefirst.
"I'd love a big family at some point but not for a couple of years," she said.
The singer said she is happy that her bandmate Una Healy is expecting her second baby with her rugby player husband Ben Foden.
"I'm happy playing the auntie role," she added.
Following the news of Una's status as an expectant mother, King is not sure who will be the next band member to give birth.