Ch.39: Is "his" majesty in her period? You know the "stomachache" thing, so the scenario will be now that she will jump into the water to rescue her wife and get wet so the blood will be obvious or something like that and the empress will notice etc etc
oh wow, very keen of you.. damn you called it.. i was so confused at first with the blood, i thought she got caught in something while diving in, but this makes more sense, plot wise with the reveal and such.