The former Atomic Kitten star, who has a three-month-old daughter with Kay, is keen to add more kids to her brood with her future husband, reported Contactmusic.
When asked if she wanted to have more children, Katona said, "Yeah. George would have another one."
The 33-year-old singer, who suffers from bi-polar disorder, also admitted to being the "happiest she's ever been" with Kay, whom she first got to know in her teens.
"He's my best mate. We've known each other since we were 14. George asked me out when I was 17. In fact he asked me to marry him and I said no," she said.