Missing envoys
This sister of Madam Mo once sailed through the seas and brought many rare items from the sea and other places. She was really strong and bold but later on, she was betrayed by her own partner. It caused Second Madam Mo's entire life to be ruined.
Second Madam Mo lost a leg, which was later amputated. Though she could walk with the help of the amputated leg, she had to give up her business. And all of it was later gobbled by the woman who betrayed her, even now that woman was flourishing while Second Madam Mo spent her days drinking and sleeping with mers. She was already in her late twenties but she did not marry anyone.
Because of this Old Master Mo was really worried about his second daughter, fortunately, Madam Mo was a fitting heir and could lead the Mo family as the matriarch of the Mo family without any problems. If not everything would have been ruined!