After Marrying Him, the Ending Has Changed

The well-off little salted fish transmigrated to a poor era, where her grandparents valued boys over girls, leading to a miserable life for their granddaughters.
Fortunately, her dad, though lazy, slippery, and illogical, shamelessly relying on his parents and taking advantage of his siblings, was protective of his daughters.
Her drama queen mother, who was lazy but liked to eat, often tried to coax food off of her, yet she always left a portion for her.
There was also the Scholar Tyrant System that pressured her every day to strive for progress, capable of using high-tech to hunt and allowing her to eat meat!!
It wasn't until her cousin from her second uncle's family changed drastically after nearly drowning that Jiang Mianmian realized she was in a reborn female protagonist novel of that era, and her family of three was destined to meet a tragic end as reprehensible relatives.
However, Jiang Mianmian, who knew the plot well, was fully capable of avoiding the tragic deaths of her parents and was not afraid of the seemingly strong but actually hollow protagonist. Her only worry was the powerful ally backing the protagonist.
Then she discovered that the protagonist’s powerful ally was none other than the beautiful young man her father had rescued from the icy river last month!
So Jiang Mianmian was completely reassured. With this life-saving favor, the young man would definitely not side with the protagonist against her family in the future.
Moreover, Dashan took the initiative and said, "Little Lamb, I’d like to court you with the intent of getting a marriage license, is that okay?"
As someone obsessed with good looks, Jiang Mianmian struggled and then reluctantly refused, “No, I plan to have a son-in-law who will marry into the family.”
The powerful ally didn’t hesitate, “Then I’ll be the son-in-law who marries into the family, and the children will take the Jiang surname!”
Jiang Mianmian: “Let’s go, get the marriage license!”
(Updated and posted at 10:10 AM on the 16th of this month)