Of all the mysteries unfolding throughout the Marvel Cinematic Universe limited series Secret Invasion, one of the biggest is the revelation that Nick Fury (Samuel L. Jackson) has been married for years to a shape-shifting Skrull named Priscilla (Charlayne Woodard). As Nick reunites with his wife after a disastrous mission in Russia against an escalating Skrull infiltration, it is revealed that Priscilla is also tenuously working with the extraterrestrial conspiracy's leader, Gravik (Kingsley Ben-Adir). Caught between dueling interests, Priscilla is right at heart of Nick’s adventure to save the world from the rogue Skrulls threatening to instigate World War III.
Source:https://www.cbr.com/marvel-secret-invasion-charlayne-woodard-interview/