when did they have sex? i thought with the whole concubine situation it's like a rotation of each girl with the emperor every couple of days and rotates, I guess maybe the author didn't want to draw any of that but at least show us the concubines visiting the emperor at night or sleeping together or smt otherwise, this just looked like
a), she's faking/pretending to be pregnant
b), she cheated with some other dude like Mr_reach said is trying to pass it off as the emperors kid
c), maybe this is actually her trying to pressure the others by making herself seem to be in the lead as empress or smt
Also i'm like 80% sure that they are even married yet or have just married cause weren't they just competing for the position of concubine like a few chapters ago, I thought they are still "competing" although these 3 will probably all be married or at least part of the concubines' but still, when would they have had sex?