Sense Sonnet - Chiller

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He would not let me speak my mind.
I was under his full control.
He manipulated behind,
Depriving me of heart and soul.
I overheard him on the phone,
Planning to tear me limb from limb,
Destroying all that was my own.
I had to get the jump on him.
And so while he was fast asleep,
I stabbed his heart with a sharp knife,
Then cut away his entrails deep,
Switching him into my old life.

Now, a new dummy does exist,
And I am the ventriloquist.