How Do I Avoid Being Killed by the Protagonist After Becoming a Cultivation Master?

After transmigrating to a world of immortal cultivation, I was all set to punch the Heavenly Venerable and stomp on the Great Emperor, only to discover I'd somehow merged with someone! I have a wife and daughter, and a happy, fulfilling life?

"Dad, I'm going to call off an engagement."

"Hmph! Thirty years east of the river, thirty years west of the river. Don't look down on a poor young man!"

"Ancestors above, who'd have thought that down-and-out nobody we know had an immortal physique? Once the job was done, I had it transplanted. I spared their life, and they're so grateful they'll never dare cause us any trouble."

"...Are you trying to kill me? Here's a knife! Go on, stab me with it!"