Whatever problems he’s having with Jennifer Garner — and by all accounts they’re serious — Ben Affleck is being the dutiful dad to their children. E! News reports that Affleck took daughters Violet, 9, and Seraphina, 6, to one of Taylor Swift’s concerts at the Staples Center in LA this week. Affleck even took the kids backstage to meet the “Shake It Off” singer. Affleck and Garner, who have split after 10 years of marriage, also have a 3-year-old son.