Kourtney Kardashian isn't sure if she wants more children.

The 'Keeping Up with the Kardashians' star has son Mason, four, and 19-month-old daughter Penelope with her long-time boyfriend Scott Disick, and although that it makes her ''sad'' when they grow out of their clothes, she admits it can be a ''challenge'' to find time for romance.

Asked if she plans to expand her family in the future, the 34-year-old beauty told UsMagazine.com: ''I mean, I don't know, I'm so busy right now...I always feel like it's in God's hands, so we'll see, but I love tiny clothes. They're the cutest things in the world and it does make me sad when they get bigger.''

Kourtney prides herself in being a very hands-on mother and still shares her bed with her children, as she believes in the somewhat controversial attachment-parenting philosophy.

She explained: ''I mean, I have no idea where it came from because I definitely didn't sleep with my parents unless I was sick or something. I don't know, it just kind of grew. I wasn't reading attachment-parenting books before; it's just what came naturally to me. I think even with different kids, it's different. Each kid needs something different. I'm sure all the family thinks I'm insane for having them in the bed and breastfeeding for a long time, but whatever.''

She also told the April issue of Redbook magazine: ''It's what came naturally to me; I didn't plan it. When I had Mason, I just felt really attached to him and wanted to bring him everywhere. He ended up sleeping with me, and I breastfed for 14 months.''

She added: ''They go to sleep in their rooms but end up in my bed, sometimes within minutes.''

But Kourtney confessed it is a ''challenge'' for her and Scott to find time to spend alone together.

She said: ''It's...something we talk about constantly. Mostly there are times each night when the kids are in their own rooms, and sometimes it even lasts all night. Every night is different.''