The holidays are about revolting your family, one member at a time.

Me: I have a cold. I feel like I JUST was sick.
Uncle: Hmm, can you think of anything in your house that might be causing it?
Me: Probably all the mold in the shower I keep neglecting to scrub out.
Uncle: Uhhh, yeah... if you have mold in the shower, you really need to clean it.