London, Dec 9 - Pop star Madonna is considering adopting a third child and believes she is a good mother.

Madonna has two biological children - Lourdes and Rocco - and has adopted David and Mercy, but she hasn't ruled out expanding her family further by adopting another kid, reports contactmusic.com.

Asked if she would adopt again, the 51-year-old said: "Never say never."

"I have four children now and I would like to think I am a good mother. I feel a great sense of satisfaction in all areas of my life," she added.