Jennifer Lopez and Alex Rodriguez are "getting more serious".

Jennifer Lopez

Jennifer Lopez

The 'On The Floor' hitmaker reportedly "can't get enough" of the retired baseball player, who she has been dating since late February and early March.

A source said: "They are definitely getting more serious. When they are apart, they speak every day. It's like they can't get enough of each other."

Alex was recently spotted hanging out with Jennifer and her mother and he has also met with Jennifer's two children - Max and Emme, both nine.

The insider added to People magazine: "Jennifer's family is excited about her dating him. They think she finally scored. [Meeting the parents] is, of course, a big deal but a natural step ... She is spending time with his family, too ...

"It's always unpredictable when you try to merge to families with young kids, but so far so good. The kids have all spent time together, and everyone is getting along."

Alex confirmed the pair's relationship during a television appearance last month.

When asked about their relationship, he said: "It's obvious. We're having a great time, she's an amazing, amazing girl, and one of the smartest human beings I've ever met and also an incredible mother. She just likes simple things. I mean, she's a very, very simple person. Loves family. Is a great sister. Is a great daughter."

And a source recently claimed the pair are considering marriage.

They said: "All his friends can tell he really likes J.Lo [but] in the beginning they thought this may just be a fling.

"Friends are slowly thinking this may actually be a great match. He calls J.Lo his 'lady'. He would wife her up in a heartbeat ... she is different than other people he's dated."