Oh, well that explains a lot, still can't see Lady Sun being too popular with the rest of the harem, given how she was probably a go-getter and such strong and good women aren't usually all that well liked in these harems back in the day (they can't all be a Suk-Bin, capable of winning over just about an entire harem on account of her kindness lol).
Another question for clarification, was Lady Sun remarried after she returned to her brother's household? I can't see why not, because as the sister of the Emperor/King of Wu she would be highly marriageable property back in the day. Also, about Liu Bei, whatever happened to his other children? I've again, tried finding more details on them, but can't seem to find anything so was just wondering.