The first signs, that something was wrong, were very subtle. He wanted a datapad and stretched his hand to reach for it, but instead it flew in his hand. He considered himself overworked. The other day, he did the same thing with a glass of brandy and the next day, when he woke up, things were floating in his room. Admiral Piett had finally had enough and mustered the courage to confront the resident Sith lord, who simply had no concept of privacy or decent manners. He was pleased that he was cared for, but that force antics should stop. Piett used given access codes to Vader’s private chambers and as he marched in, he froze on the spot. The emperor was obviously struggling with some strategic explanation.
“Lord Vader, yes midi-chlorians can be passed on the next force sensitive generation. However there is another way how to …” The emperor's hologram made a gesture, which would be considered as deep embarrassment for a lesser creature. “ how to transfer them to non-force sensitive, but with compatibility with them. The Jedi prevented it with their vow of chastity…or rather by not swallowing the thing.”
Piett swallowed, actually he did every time.