Jennifer Lopez' boyfriend wants children ''in the future''.

Casper Smart, 25, insists he is not ready to have a family with the 42-year-old singer-and-actress - who has four-year-old twins Max and Emme with ex-husband Marc Anthony - just yet but wants to be a parent one day.

Asked if Jennifer's new movie, 'What To Expect When You're Expecting', had made him want to have children, he said: ''I see what you're doing ... I'm not playing your game.

''I for sure want kids in the future. In the future ... When I'm ready and when the time is right.''

Casper explained he and Jennifer met through his work and says their romantic relationship happened ''spontaneously'' because they ''couldn't fight the chemistry''.

He added to E! News: ''It just really spontaneously happened I guess. The chemistry was there. You can't fight it.

''She's just a beautiful woman. She's just a good person. Like anybody else, we cry the same, we bleed the same, sweat the same. We're all just people.

''We're not married, we're not engaged. We're just enjoying our life right now.''