Jennifer Garner «is happy» for Ben Affleck amid his reignited romance with Jennifer Lopez, a source tells ET.Garner, who was married to the actor from 2005-2018, «can tell he is happy,» the source says, adding that Affleck and Lopez's families are «getting along great.» Affleck shares three children -- Violet, 15, Seraphina, 12, and Samuel, 9 — with Garner, while Lopez shares 13-year-old twins, Emme and Maximilian, with ex-husband Marc Anthony.«J.Lo and Ben's families are getting along great and