Kourtney Kardashian struggles to balance her work and motherhood.

The 31-year-old socialite - who has seven-month old son Mason with boyfriend Scott Disick - admits she is pleased she can take her son with her when she has to work but is worried about him not having a fixed schedule.

She said: "I bring Mason with me everywhere that I can as long as it's safe. I struggle with the thought of whether I should be leaving him at home to have a regular set schedule and nap even if that means not being with me. I think whatever works for each individual situation is best.

"Mason is so easygoing and loves seeing new places and meeting new people. I love having him with me and always knowing he is safe and taken care of. It fits into my lifestyle."

However, Kourtney recently had trouble when she felt guilty in the middle of watching 'Sex And The City 2' with her family because she was not spending time with Mason.

She wrote in her blog for People.com: "I hadn't seen a movie since before Mason was born and was dying to see 'Sex and the City 2' with my mom and sisters. Mason stayed with Grandpa Bruce and had some "man time".

"An hour into the movie I started to feel guilty, like, 'Why am I at a movie? I would rather be with my son, he's the most important thing to me.' I'm sure other mothers go through this guilt, but I do think some me time is important also!"