Jennifer Lopez and Jennifer Garner have more than just Ben Affleck in common. They're both also great and dedicated mothers who connect over that special bond.A source tells ET that Lopez, 53, and Garner, 51, «are very cordial and they have a very healthy and functioning relationship.» The source says their kids are also getting along well and «learning and growing together as a new, extended family,» which consists of Lopez's 15-year-old twins, Max and Emme, whom she shares with Marc Anthony, and Affleck's three children, Violet, 17, Seraphina,14, and Samuel, 11, whom he shares with Garner.