"No clones, golems, or dopplegangers," Sirius warned Gaius in mock severity. "But you're certainly welcome to try for extra snogging!" he added, following it up with a kiss to the back of Gaius's neck. "And of course you need to see the children. Give Remus and Serenus my love, would you?"
He had a few presents that he was sending along as well -- a small one for Serenus, so as not to seem to be imposing, and a more significant gift for Remus, his husband's feelings be damned, not that he expected them to be at all affected.