Didn't he go back to Earth to live with his human relatives? My guess would be that Worf would be his eccentric uncle/cousin who came to town every now and again to take him hunting and tell him war stories. Plus the Rozhenkos are on Earth, so I'd imagine Worf would ask that they keep in touch with him, too. I bet that, aside from the trauma in this episode, he probably had a pleasant and uncomplicated life on Earth, but he could tell kids at school that he was also a member of a Klingon family and they'd have to believe him or else his Klingon crew would have to show up to defend his honor. That would be rad, imo.