While Mama Bear happily goes about her housework, singing a merry tune showing how happy she really is, Papa Bear is lounging around instead of fixing the small hole in the roof, which he doesn't think would cause a leak even if it was raining. So when rain threatens, Papa Bear decides to fix the roof, largely so that Mama Bear won't bother him anymore. But instead of fixing the roof, he does whatever he can to look like he's fixing the roof without actually doing so, which may get him into trouble in more ways than one, especially when the storm hits.
—Huggo