Jack the Dog (2001)

Jack is a successful photographer who has always been a womanizer. But at one point in his life he wants to settle down. He marries Faith and together they have a son, Sam. But things aren't working out that well as the two, due to Jack's active working life, grow apart more and more. When Jack can't control himself anymore and starts an affair with Hope, the marriage is over. Faith moves to London to marry the wealthy Klaus and wants to take Sam with her. But Jack wants his son with him and both agree to shared custody. Jack desire for women doesn't vanish, but living together with his son slowly brings a change in him.