His mother-in-law?
How could Princess Xinyang be his mother-in-law?
Xiao Liulang is not Princess Xinyang's son, Princess Xinyang only has one son, and that is Xiao Hen.
Xiao Hen is already dead.
Wait.
Could it be that Princess Xinyang adopted Xiao Liulang as her foster son?
Compared to believing that Xiao Liulang was the departed Xiao Hen, Gu Changqing's first thought was actually adoption.
Gu Changqing couldn't be blamed for thinking this way, as there had long been rumors in the Capital City—Xiao Liulang bore a striking resemblance to Xiao Hen, and precisely because of this, the Marquis of Xuanping looked after Xiao Liulang quite favorably.
Could it be that Princess Xinyang also saw the shadow of her son in Xiao Liulang and thus simply adopted him as a foster son to comfort her yearning for her child?