When Simon was 2 years old, he was adopted by Michael and Sharen Gravelle. The Gravelles house eventually grew to be filled with 11 fostered and adopted children.

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But Simon claims the house was anything but happy. He claims he and most of his siblings were “treated like animals” and spent time confined in cages. Watch more of his story here.

When he was 8, the Gravelles were arrested and the children were moved to other homes. Simon hasn’t seen many of his siblings since that day 10 years ago.

WATCH: Teen Says She Asked Parents If She Could Sleep In A Cage: ‘I Wanted To Be Like The Rest Of My Siblings’

“I think about it every day. I miss my twin sister. I miss my brother. I miss all of them, really,” Simon tells Dr. Phil on Monday's episode.

In the video above, Dr. Phil surprises Simon by reuniting him with his older sister Abba, whom he hasn’t seen or spoken to in 10 years. Watch their emotional reunion. And on Monday's episode, the brother and sister are reunited with the man who reported the abuse which helped lead to their rescue. Check here to see where you can watch.

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