Zane and Zephyr only had a short relationship, but Zane didn't entirely cut Zephyr off until he went to prison. Up to that point, he was at least *aware* of what Zephyr and their kids were up to. In the present, Zane has had his own contacts check in on Zephyr, but he isn't sure it's wise to make contact again. He is a new person living a new life; maybe it's better that the ghost of a criminal who couldn't handle a family doesn't come back.