Lucky could sense that there was something very wrong in that house, but didn't know specifically what.

He noticed that everyone in the house minded their business, and that was very strange. It was right for them to poke their nose in each other's business, so the fact that they didn't, creep him out.

He tried to watch Mary closely, but he could still see nothing. She was mostly morose and looking uninterested, like she wanted to be alone all the time. So, he left her alone.

But still, day by day, the uneasiness he felt within him whenever he was in the house increased.