So, she wasn't really questioning Shi Mo; she just needed a legitimate excuse to expel her, to set the stage for it.
For Mrs. Shi, the reputation of the Shi Family is above all else. Anyway, now that she has a grandson, getting rid of the daughter-in-law she has always been dissatisfied with, and now has a tarnished reputation, is only natural.
She suddenly also understood the real reason Ling Yunshu released this scandal.
She wanted to ruin her reputation, to have her scorned by everyone, implicating Shi Che, implicating Shi Mo, implicating the entire Shi Family.
Once she had a stain on her reputation, Mrs. Shi would never tolerate her.
Even if this child really was hers and Shi Che's, even if she truly was innocent, what does it matter? The moment something like this breaks out, it's meant to be irrefutable, something you can't clearly explain no matter how you try.
