Middle-Aged and Divorced, What Is This Reversal System?

Li Huiling thought she had a blissfully happy marriage to her civil servant husband. Then she gave birth in middle age and unexpectedly got bound to a divorce-and-comeback System twenty years too early. Only then did she realize that the happiness in her marriage was just a facade. Her husband had been a cheating scumbag for years, and he and her mother-in-law had turned every one of the children into an ungrateful brat. To avoid being divorced in her old age and abandoned by her ungrateful children, she had to prepare early! But why was the System getting more and more twisted? Her first love, a wealthy businessman, a university professor who did research... Why were they all throwing themselves at her so fiercely? Had she become a heartthrob in her old age? Why were so many high-quality men falling for her? Which one should she pick? Help, answers wanted!