Heidi Klum is addicted to having babies.The Victoria's Secret model - who has two sons with husband Seal,two-year-old Henry and one-year-old Johan and a three-year-old daughter Lenifrom her relationship with Italian businessman Flavio Briatore - hasconfessed she misses being pregnant and wants more babies.Heidi, 34, said: "I do miss being pregnant. Children are very addicting.Once they start growing up, you miss when they were little. So, maybe."The German supermodel also revealed her singer husband treats daughter Lenias his own daughter, but is rather rough with his sons because he wants themto grow up tough.She said: "Seal is Leni's father. Seal and I feel very lucky that we foundeach other. He's my best friend. He would never go in through a door first.He always opens the door for me and steps back so I walk through."He is the same with Leni, but he is a little harder and rougher with theboys. I'm always reminding Seal that they're little, but he says, 'They needto rough it up a bit.' "The 'Project Runway' presenter also revealed her expensive 10-carat diamondengagement ring - which Seal helped jeweller Lorraine Schwartz design -doesn't sparkle because she is too scared to take it off and clean it.She added to the USA Today newspaper: "It's so dirty because I never take itoff. I'd rather have a dirty ring than lose it down the sink. Look, it'slike a big cloud."