Su Wanyi was shocked because she didn't understand why Tang Feng would say such a thing.
Could it be that Tang Feng and his family already knew Lu Han's worth?
She thought they didn't know, so when Wen Ai earlier suggested that Lu Han should apologize to her son, although she also felt that such a demand was simply overreaching.
But she didn't argue and instead came back to convey Wen Ai's request to them, also as a way to test the waters.
Now, the result of her test had come out.
If Tang Feng knew Lu Han's true identity, then it was no wonder.
Was the reason Tang Su and Su Ruoan were so eager to declare her relationship with Lu Han and to make it public in front of their whole family simply to guard against all eventualities?
When their father was still alive, didn't he always say that among the Su Family's five children, the third Su was the most honest and least scheming?