It's a threat.

What Alden did might be reported to the authorities. From the time she returned from the funeral until just before dinner, Hannah had been thinking about Alden's words.

The emotional turmoil in her heart was obvious; Alden's actions could possibly fall under the category of threats, unpleasant behavior, or who knows what else.

But Hannah had no hard evidence. It was all verbal, and Alden could deny it. Especially since there were no witnesses. And there's no guarantee that the police would support her if she reported it.

Who doesn't know the Harrison family? It might not be Alden who ends up in jail; it could be...