Anakin actually enjoys Kylo Ren's constant attention and adoration, because it makes him feel like a god.

His ghost shows up and orders Kylo along in masturbation (or just various kinky activities) with very vivid instructions regarding what he wants him to do. Such as "Don't put so much lube on the dildo; I want you to feel this for days." or "Beg Granddaddy for permission to cum."

Any terrible kink that the filler wants to add is more than welcome! OP just wants to see Anakin having a little too much fun with his number one fan.