Los Angeles: Madonna considers herself a tough mother, but she believes she needs to be tougher.
The singer raises daughter Lourdes, 15, son Rocco, 11, adopted son David, six, and daughter Mercy, six.
"I think I am a tough parent, but honestly I don`t think I`m as tough as I should be. I think I need to be tougher. It`s hard though. Everyday is a negotiation," contactmusic.com quoted her as saying.
Her eldest daughter Lourdes was seen smoking in New York in March, and Madonna was not very happy with it.
"Cigarette smoking I`m not very fond of, for anyone, I don`t approve of anyone smoking cigarettes, most of all my daughter," she said.
Madonna`s latest album "MDNA" is out in the market, and she is currently preparing for a world tour over the summer.