The Lycan King's Female Alpha Mate

I already dressed her up like a son and told everyone that our baby is a boy, so you don't have to worry. Nothing will happen to both of you.' The alpha mind-linked his mate and she forced out a smile.
'I also thought about it when I was dressing her up. Thanks darling, I hope nothing goes wrong.' She replied with a dry voice. It was obvious she wasn't happy.
Messiah Jordy King was born as a first child of the alpha in a pack that it was forbidden to have a girl as the first child of the alpha.
How long would they be able to keep the secrets?