Hero's Gender-Bending Rewrite of the Past - You've Always Been a Low Rank Female Grunt, Don't You Remember?

The Earth is under attack by the Time Eaters, an alien monster organization seeking to alter the past and rule the future! But fear not, foe standing before them is one fearless man, Chronos Zwei, the hero of the Earth! But future becomes uncertain when Zarie, the leader of Time Eaters, captures Chronos' mother and rewrites her past to have always been the organization's cumdump. With the hero's mother being an underling cumdump from before he was born, what would that make him? For one, a woman. And also just another cumdump. Will Chronos reclaim her heroic past or accept her new future, take Zarie's dick and leave Earth at Time Eaters' mercy?