Yeah. I though about it too but it's too early to guess. Need moare chapters xDSo judging by the general's gift, I think she knows that the emperor is really a girl which also means she's a major ally to the emperor.
Remember the mom is involved with the secret (hard to imagine how she's not the one enforcing it) so the marriage she wanted using Ming Wei instead would have been the easiest path to take if Qui Nian simply needed a surefire way to protect the secret. The mom would have picked someone who would have have kept it too. There was no reason for Qu Nian to find a useful "idiot" for the job.Also, I wonder if one reason for picking the naive idiot as her wife was to eventually try to gaslight her into thinking some (or all) men look like women when you remove their clothes, and that the difference is all in presentation. Just hoping she hadn't been taught any male anatomy.