Jennifer Lopez's boyfriend is reportedly going 'out of his way' to show he is a good father figure.

The 43-year-old star is dating her backing dancer Casper Smart, 25, and they have been beset by rumours they are going to marry and start a family.

Jennifer has four-year-old twins Max and Emme with her estranged husband Marc Anthony and Casper has apparently been bonding with them.

'Casper knows how much Jennifer loves her children, and he's gone out of his way to spend more time with them to show he is a good father figure,' a source told National Enquirer.

Caper apparently feels ready to settle down properly with Jennifer. Showing how well he gets on with her children is his way of proving he can commit.

'Jennifer is a true romantic and wants to get married again and possibly have another baby and Casper is playing to that,' the insider explained.

'He thinks that offering to have a baby with Jennifer will show her he's serious about a future with her.'