Washington, Oct 1 (ANI): Queen of Pop Madonna says she's open to the possibility of extending her family further.

The 'Celebration' singer has daughter Lourdes, 12, son Rocco, nine, and adopted children, David and Mercy, both four, reports Contactmusic.

When quizzed if she will be a mother again, she replied: "Who knows? I have my hands full right now! I have no idea! That's all I'm going to say. But we never say never."

However, she won't be extending her family any time soon as she has several charity projects and movie ventures up her sleeves.

She explained: "I have several projects going. I have another script that I've written, and I want to direct another film. Hopefully, I'll be doing that next year. I also have many projects going on in Africa right now that I want to bring to fruition, like building a girls school and working on two new documentaries."

While talking about her eldest daughter, Madonna, who's reportedly dating model Jesus Luz, told website Popeater:

"Lourdes is super-sister. She's amazing with the little ones.

She has the typical relationship with her brother, Rocco.

They're like, 'I love you/I hate you' every five minutes. But with the two little ones, she's great. She's amazing. Very protective." (ANI)