MY 6-YEAR-OLD NEPHEW DRAGGED HIS BROKEN LEG SEVEN SIDEWALK BLOCKS TO MY HOUSE WITH HIS 3-YEAR-OLD SISTER CRYING IN HIS ARMS. THEN HE WHISPERED: "SHE LOCKED US IN THERE AGAIN."

The injury was not new. The evidence showed a pattern that made me understand why Drew had crawled seven sidewalk blocks while carrying the responsibility of protecting his little sister.

I thought calling for help was the hardest moment of the day. I was wrong. The hardest moment came when Drew realized adults were finally listening to him.

The questions that followed uncovered details Reena could no longer explain away. The story she told everyone about being a caring mother began to fall apart as the truth about what happened inside that house started coming out.

But there was still something I needed to know: how long had Drew and Lily been carrying this secret alone?

The answer was waiting in the next discovery, and it revealed just how much those two children had endured before reaching my door.