"Is Housey (our old house) a mansion?"
"No. Housey is a house."
"Is the Big Blue House (our new house) a mansion? It's big like a mansion."
"No. Big Blue House is big, but it's not a mansion." (unless mansions are extremely messy, I could have added).
"I want to lay in my pool at my mansion with my Ninja-trainer-agent and count my money."