could empress mc get married again after luk's death?
Yes they can! There's no taboo against an empress remarrying, and in some cases a widowed empress is actually considered a highly desireable spouse. The one cultural norm that applies in this case is that a widowed empress shouldn't marry someone who already has a wife/wives.
It's kind of a weird line where it's general expected that widows without adult children should/need to remarry to have a husband to take care of those children. But for an empress remarrying anyone would technically be a reduction in status becuase as long as she remarins unmarried she's still titled as dowager empress but if she remarried she'd have to take her new husband's title.
So there's a place where its acceptable to take a reduced social status to provide for your children, especially if the dead emperor didn't leave his wife any funds upon his death. But Nytherians are all about gaining as much social clout as possible, so the empress does need to be careful not to reduce her social status too much. And in the polygamy politics the first wife is considered above other wives. So it's generally seen as okay for an empress to marry again if she still has nonadult children, and is the new man's primary wife
