Reborn in the 1980s: I became a stepmother in the 1980s

Once she opened her eyes, Si Nian became the fake wealthy daughter straight out of a period drama, only to be sent back to the countryside to marry a divorced man in place of the real wealthy daughter, and on top of that, she had to raise a bunch of brats.
Not only that, she also ran into the reincarnated real wealthy daughter.
In her previous life, Lin Si Si was pressured by her family to marry an older divorced man who treated her coldly and indifferently. Meanwhile, Si Nian, who stole her wealthy daughter status, married a military officer and lived a sweet and happy life.
In her second chance at life, she was determined to steal Si Nian's military officer husband and make her taste the bitterness she had endured. But the real wealthy daughter's plans didn't go as expected.
Instead, Si Nian stayed by the side of the older man, amassed a fortune of billions, and her children flourished.
When she was brought before the older man, Si Nian was not at all flustered:
"This is the man who would rather help others raise children and adamantly refuses to have his own."
While others avoided him, Si Nian's eyes lit up:

"Firstly, being a mother is a noble act, and secondly, I will be a great stepmother."

Years later, after the real wealthy daughter dealt with the military officer's illegitimate child and was robbed of her inheritance, she found herself in unbearable misery. She thought to herself, even if it's not ideal, it's still better than how Si Nian is living. Having children or not, raising others' children - what's the difference from being a nanny?
But one day, that terrifyingly cold and fierce wealthy man, who was now tenderly supporting the pregnant Si Nian out of the car, cradled her in his hands with such affection that it was beyond measure.
Si Nian angrily pulled the man's hair, "Didn't you say you didn't want children!"
The older man gently kissed her hand, "Wife, I was wrong. I'll consider having one next time."