Hmm. I'm sure everything went back to normal but the Dursley's had a bit zaidi respect for Harry after everything that happened. I'm sure Harry and Dudley had an okay relationship after what happened in DH. I imagine Dudley and Harry's kids saw each other. I also agree that they woudln't like it..I mean come on it's Dudley's children XD.
Yeah I did, but it's not like they never saw each other again, because Harry au someone would come back to inform the Dursleys that Voldy was dead, so they'd come out of hiding and maybe Harry met up with Dudley (definitely not Uncle Vernon). But yeah, I still wondered where they went.