In the original plot and the plot after being poisoned, neither version reveals any issues with He Siyu's background.
But, having lived in the novel world multiple times, He Tiantian felt something firsthand—
The way the author presents the text is one thing, the real novel world is another.
The plot does not disclose He Siyu's background, but that doesn't mean there isn't a problem; it's possible the author doesn't consider it important.
After all, the He Family doesn't have a throne; whether it's a biological daughter or not, Mr. and Mrs. He treat them equally.
Background matters have no direct relation to He Siyu's romance or her Reverse.
Or perhaps, even the novel author hadn't considered it, yet in the extended plot world of the novel, such a possibility exists.
"Mom, wasn't Siyu not in our home right after she was born? Was she brought home after her full-year birthday?"
He Tiantian didn't outright ask "Is He Siyu adopted," but subtly brought up her question.
