Kendra Wilkinson thought she had gas the first time her unborn baby kicked.
The pregnant former Playboy Playmate - who is expecting her first child with American football star Hank Baskett - was amazed when she first felt the baby kick as she thought it was too small to move.
She said: "It was so crazy, I felt it kick on Monday (13.07.09). I was just sitting there and then all of a sudden, 'Bam!' I was like, 'That wasn't gas!'
"I got really excited even though it felt weird. I was like, 'Oh my God, something's in there! It's healthy!'
"Hank is in Phoenix, and I called him right away and was like, 'I just felt it kick for the first time.' I just researched on the internet if you can feel it kick this early. I'm four months and one week right now, and it said I can, so it's crazy!"
The 24-year-old star is yet to discover the baby's sex, but is adamant she is having a boy.
Despite her readiness to include much of her life in her reality TV show 'Kendra', she has vowed not to let cameras follow all her pregnancy.
She explained to Us Weekly magazine: "The birth will be private. I want to be able to spend my quality time with what's been growing inside of me for nine months!"