Regarding ducks and universes

In 1986, the universe suddenly bifurcated. Thirty-five years later, Felix spends his days lunching at Coconut Café and dreaming of a successful writing career. Everything changes when his Aunt Henrietta dies, leaving Felix a photograph of his father and himself-- dated ten days before Felix was born. It can only mean one thing: Felix has an "alter" in Universe B. He crosses to San Francisco B and proceeds to flagrantly violate the rules of both worlds by snooping around his alter's life.