At the end of Star Wars: The Empire Strikes Back, Darth Vader famously offered his son, Luke Skywalker, the opportunity to jointly rule the Empire with him.
(Or possibly in a triumvirate with Emperor Palpatine. It's unclear exactly what Vader had in mind.)
The risk was high, as was the reward. But the alternative was to fight for the rebellion and probably die. The best bet was with the Empire.
What would have happened if Luke had accepted his father's offer? Read the rest by Andy Kluthe and Andrew Bridgman at Dorkly.