That's a really disturbing and unusual situation. Usually, such content is not normal and might be included for shock value or to depict extreme abnormal behavior.
It's a very odd concept. Maybe in some comics, it's used to show a deeply disturbed or mentally unstable character, but it's not something that happens in real life and is often just a fictional extreme.
This is a strange and unlikely scenario. Maybe the comic is trying to explore very dark or taboo themes, but it's not a common or acceptable occurrence in any normal context.
A practical answer is Chapter 9, because it turns the idea into a concrete scene. The chapter opens with Exactly, the Qiao Family isn't that great either., adds pressure through Since it was for the Jiang Family's welfare, then as the matriarch, she..., and ends on Qiao, unable to save face.
If you want the clearest chapter reference, go to Chapter 40. Early on, [Jiang Li claims she copied this herself?; later, the chapter leans on But her calligraphy is actually this pretty?] [Jiang Li dares to boast,....
Chapter 881, "How to Deal with Her Few Younger Brothers?", is the clearest early answer because it turns Jiang Shixu's situation into a concrete plot event. It opens with After settling Jiang Li in the car, Zhao Lang fetched the medical kit... and closes on It was Jiang Cheng in pajamas..
Chapter 836, "It's been a long time since I last saw Jin Siyue", is the clearest early answer because it turns Gu Qiang's situation into a concrete plot event. Early on, You!" Rong Junsheng seemed to have heard the commotion over here and....
Chapter 756, "Birthday Banquet", is the clearest early answer because it turns Jiang Cheng's situation into a concrete plot event. The chapter gives readers a real answer by opening on On the day of the birthday celebration, the Jiang Family got up early.
A practical answer is Chapter 37, because it turns the idea into a concrete scene. The chapter opens with The barrage was suddenly filled with hahas, but the two guests present..., adds pressure through The moment her gaze landed on her, she couldn't help but pause., and ends on I look forward to.
Chapter 10 is the strongest chapter-level answer because it starts from Qiao's shocked face struggle to recover, Lin Manru also tasted for the... and follows through on Who was it again saying that the Jiang Family's tradition was lacking,.... The payoff is that the chapter closes with "She...
If you want the clearest chapter reference, go to Chapter 16. Early on, Just as the words fell, Jiang Shixu swiftly cast his eyes downward.; later, the chapter leans on His eyelashes were very long; when they fell, they could cast a small....
Chapter 726, "She Has Already Tried to Keep a Low Profile", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. Early on, Su Yinwan was using the money she had recently acquired to boost.... By the end, After some thought, she took out her phone..
The best chapter pointer here is Chapter 5, "Catching Adultery Personally". It opens with Actually, when Manager Fang saw Jiang Li, he was somewhat surprised. and closes on Recently, he did suspect that his wife was cheating on him, but due to the....