This woman was just a stepping stone for him to get the Mu family's inheritance. He could be engaged to her and cared not if they got married, but for him to touch this woman…
Impossible.
Hence, he made up the story about her being infertile.
Everyone believed that claim in the end.
When his grandfather learned of her infertility, he was somewhat hesitant. After all, he cared deeply about the matter of progeny.
The wedding was repeatedly postponed thereafter.
She also took the news for real and wholly believed herself to be infertile.
She did not know that she was just a pawn in his game all this time.
Moreover, he had evidence of her infidelity in his hands.
There were voice clips and camera footage that could prove just how 'innocent' she was.
This woman is too naïve.
It was ludicrous to play such a dirty trick on him.