Lily Allen got bored staying at home with her children.

The 'Hard Out Here' singer - who is married to Sam Cooper - retired from music in 2009 but made a comeback last year and admits she did so because she felt unfulfilled spending her days with daughters Ethel, two, and Marnie, 14 months.

She told France's NRJ Radio: ''Why did I choose to come back? I ran out of money! No, I'm joking! I thought I'd be a really happy mum just sitting at home, playing with my kids, that was my dream.

''I love my children, but I'm a very impatient, busy person naturally so two babies, neither of them can talk, it was quite boring! Staying at home all day talking to people that can't talk back.

''I didn't realise how much of a creative person I am and that I need somewhere to put my creativity.''

Lily admits motherhood has affected her music as she is ''conscious'' that they will hear her songs so she is more careful about not ''embarrassing'' them with her lyrics.

She said: ''When I write music now I'm conscious that I have two children and they're going to hear it. I can't be too sexy or gross or rude because that would be embarrassing for them. It's a different kind of me, but there are still the same elements.''