Question: My kids spent last night with me. What do you tell you S7 when he starts saying after being called to attention: "The other house is much better than this one, it has chocolate mousse prepared by mom, it has XXX and YYYY! And this one has not!"?
Ripe, kids say things like this in innocence, he doesn't mean it to be hurtful. He's just pointing out that Mom has mousse! So just say "wow, mousse sounds yummy!" and, like Jpeg suggested, find something your house can be known for. A special recipe, a craft, an activity, something. And I'll be he goes and tells mom, "the other house is much better than this one because we get to play indoor Frisbee!"