Let me out!

The man made a robot for helping his house work.
At first, the robot did well for him and worked very hard.
But, the robot became having emotions.
And the robot envies the man's dog because the man loved his dog very much even though his dog doesn't do anything for him unlike a robot.
So, he decided to try to get the dog out.
What happend the end of the story?

I was very scared to read this book.
And at the same time, I think that it can happen near future.
I don't want to get this kind of robots.