IN THIS ISSUE: A Kid at Heart — Jen Loves Children!

As Jennifer Aniston gets closer to new flame Chris Gartin, that means moving into a more motherly role as she interacts with his two children. But even though she doesn't have kids of her own yet, Jen is already great with the younger set!

Ask anyone who's seen her on-set with young co-stars or with 6-year-old goddaughter Coco Arquette, the daughter of Courteney Cox and David Arquette.

"Jen's been a huge part of Coco's life since the get-go," an insider says. "Even before there was anything between Jen and Chris, Jen would come to all the family get-togethers that Courteney is so famous for."