While romantic entanglement hasn’t been exactly uncommon when it comes to successful musical duos -- Buckingham and Nicks, Sonny and Cher, Bonnie and Delaney, and Goffin and King simply for starters -- Freddy & Francine, or, as they’re known to family and friends, Lee Ferris and Bianca Caruso, have built a career that’s been intertwined with their feelings for both their music and each other.