Wife, Please Help Me Practice!

I traveled through time, and an old man picked me up with a beautiful sister. He accepted me as his disciple and married my beautiful sister as his wife. The master taught me alchemy, and I was very touched. He seemed to have some other unknown thoughts about his wife. The master seems to want to refine the master's wife into elixir. I am a little sad. The master's wife is very good to me. There's something wrong with the way my master looks at me lately. It seems that the old man also wants to make me into a pill. Damn, this old immortal really wants to turn me into a pill. Master's wife! Please help me kill this old bastard!