Leandro Penna wants three children with Katie Price.
The Argentinean model is keen to start a family of his own with the 34-year-old beauty - who has children Harvey, 10, Junior, seven, and Princess Tiaamii, five, from previous relationships - but she isn't sure if her body is up to coping with the rigours of child birth again.
In scenes from her reality show 'Katie', she tells him: "I don't know if my body can do that."
Katie - who has previously been married to Peter Andre, the father of her two youngest children, and cage fighter Alex Reid - also told fiance Leandro she would only marry again if she knew it would last forever.
She explained: "I've always said if I get married again then it has to be forever. Otherwise I'll get a name for just wearing a wedding dress, in different colours, all the time."
However, Leandro - who she got engaged to shortly before the scenes were filmed - reassured her he was serious in his commitment.
He said: "For me, it's very important. It's a big decision, marriage. It's not that easy."
Of her second marriage to Alex, he added: "You married very quick, very stupid."
Katie insisted her relationship with Leandro - who she has been dating for just over a year - is "different".
She said: "We don't have to think about my past ones, do we? With you, it's different, everything is very different."
