Your grandfather was commonly referred to as Xiao Chén Zi by his father.
Due to his mother being Yu'er, Xiao Chen Zi's monthly allowance was much higher than all your other grand uncles and grand aunts.
From an early age, Xiao Chen Zi had accompanied your great-grandfather—Qiuyu, on his many misadventures.
And at some point, Xiao Chen Zi had asked his father—
"Father, isn't what you're doing with other women immoral? Don't people tend to call this cheating?"
Towards this question, Qiuyu answers—
"Immoral? Cheating? Nonsense, how could that be? I'm working myself tirelessly to the bones—in an effort to raise the strength of our prestigious household! You've seen those illegitimate siblings of yours, haven't you? Their strengths—whether it be cultivation base, physical body, alchemy, pretty much everything about them are more than capable of suppressing a top-tier sect's legacy disciple of the same realm! What does this mean, you might ask? It means my seeds are amazing! Xiao Chen Zi, since you've inherited my dashing looks and talents, you're responsible for carrying on my legacy after I'm unable to get it up! The stronger and more diverse our household's talents are, the more secure our future will be! Can you imagine an entire planet being dominated by our bloodline? Actually, to hell with that! I want an entire star region to be dominated by our bloodline! If we're able to accomplish that, our household shall be eternal! Can you imagine what it would be like—to be the ancestor of such a household? One's name shall forever be remembered, and worshiped for generations to come!"
Almost as soon as Qiuyu had finished lecturing his son, his three wives had descended upon him—to throw out a series of harsh punches and kicks, which resulted in him lying on the bed for nine days and nine nights.
Despite how miserable Qiuyu's appearance had been when he was being beaten, the former's words had left a profound impression on Xiao Chen Zi's mind, and this caused him to foster a great deal of respect for his father.
"My father is a man who is willing to sacrifice his flesh for the entire household. As his son, I must be able to do the same!"
From then on, Xiao Chen Zi had surrounded himself with women on a daily basis, and by the time he had reached the age of 18, he had already amassed more than a hundred female friends—with the intent of making them his concubines in the future.
Seeing his son so intent on carrying on his legacy, it was said that Qiuyu had shed a tear, and expected a great number of talented clansmen to appear in the future.
However, Xiao Chen Zi ended up meeting a woman named Xǔ Méi.
Infatuated with Xu Mei's beauty, Xiao Chen Zi vowed to make her his main companion, and after proving his sincerity to the former—over the course of several years, the two were successfully locked in marriage.
...…
Raising a frown, the 12-year-old child asks—
"What about carrying on his father's legacy?"
"Xiao Chen Zi naturally thought to carry on his father's legacy even after marriage. However… Ai…"
Waving his right hand, which had two of its fingers covered in scale patterns, the child's father heaves a sigh, and adds—
"You see… Yu'er had a friend. They were as close as blood-related siblings. Unfortunately, that friend passed away—when Xu Mei, the daughter of that friend, was around 12 years of age. Due to the relationship that Yu'er had with Xu Mei's mother, the former adopted Xu Mei, and assuming both sides didn't have any issues with one another, Yu'er intended to have Xu Mei be Xiao Chen Zi's main wife."
"…Un."
Following the explanation so far, the child nods, to which, his father continues to explain—
"Being married to a man, who has two other wives, and numerous mistresses—Yu'er naturally didn't wish for her adopted daughter to experience the same situation as her. So, this is where your grand aunt, Wan'er comes in. Whenever the thought of meeting one of his mistresses came to Xiao Chen Zi's mind, Xu Mei would take a non-lethal dosage of poison—to give off the impression that she was in desperate need of attentive care."
"…?"
Hearing this, the child widens his eyes, and asks—
"This…? Was this thought of by great-grandmother?"
"Correct. Yu'er had instructed Xu Mei to do this—if she doesn't wish to see Xiao Chen Zi cheat on her. It proved rather effective, as Xiao Chen Zi wasn't the sort of scum, who would leave his wife's side when she was sick. Over time, all of Xiao Chen Zi's female friends moved on from him—leaving him with only his wife, who sought for his undivided attention by his side."
Sucking in a deep breath of air, the child asks—
"Did grandfather never thought that something was off about grandmother's behavior?"
"Of course he did, but what was he supposed to do? His own mother was against him on this matter—of him carrying on his father's legacy. And if he were to be disowned, there goes all his resources, and a man without a fat wallet—cannot ever hope to keep a harem of women by his side."
"…Father, are you certain that great-grandmother wasn't a spirit fox turned human?"
"…Who knows?"