度陈仓，已经成就了好事，皇贵妃无奈，只得将人换成是长得丰满貌美的庶女宋蝶。
本来宋茗是嫡女，到了司南王府肯定能够走的更远，远比宋蝶这个庶女有前途，但是事已至此，也就只能退一步，听天由命吧！而馆娃公主是知道自己儿子对云珍情根深种，哪里会愿意收妾室，因此馆娃公主将两人带回王府，随便找个王府荒凉已久，偏僻的院子安置了，这就立即过来儿子在这边，商讨接下来的事情。
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此时奉了皇贵妃李氏的命令，来司南王府做世子妾室的李丹雅和宋蝶二人，却是各怀心思，两人各有想法。
本来皇贵妃的意思是让她们二人搞定司南王世子上官誉，在