You Took Your Widowed Sister-in-Law to War? I Married a Billionaire and Had Triplets!

Synopsis:
In her past life, her husband left her in the village to take care of his entire family while taking his widowed sister-in-law to the army to enjoy a life of comfort. He called it “taking care of the widow of my late brother, so she won’t suffer in the village.”
While she survived on coarse grains and vegetables in the countryside, her widowed sister-in-law enjoyed luxury in the army. The sister-in-law’s child thrived at her side, while her own son was buried alive in an earthquake!
When she dragged her dying daughter to the army seeking help, what awaited her was not support but a cup of poisoned wine handed by her husband himself.
“You shouldn’t have come. I, your sister-in-law, and the children… we are happy now.”
Only before her last breath did she realize that in the marriage she had fought so hard to protect, there had never been a place for her.
Reborn, her first act was to kick out the scumbag, cancel the marriage, and turn to marry the iron-blooded commander rumored to have “no heirs.”
Everyone scoffed, thinking she had lost her mind and was doomed to a lonely life. But she immediately gave birth to triplets, blinding everyone with her success!
As for the scumbag who had “reunited” with his sister-in-law as he wished, he finally got the quiet, uninterrupted happiness he wanted.
Yet, why does he kneel at her door every day, wailing and begging for her forgiveness?