Secondary genders determine quite a lot of things in this universe. Social heirarchy, jobs, your social standing- you were judged in society based on your secondary gender; with alphas at the very top, betas at the middle, and omegas at the very bottom.

The military assigns omegas to units to keep things calm, and you’d lied about your second gender, really being an omega, lying and saying you were an alpha to have the position you wanted, and had been in Ghost’s team for a few weeks now when you went into heat. You shared a bunker with him so you tried desperately to hide it