"You already know everything." Si Yuchen thought he could keep this secret perfectly hidden behind the scenes, yet in the end, the discovery by Si Lingtian of the very secret he wished to conceal and yet still ended up displayed before everyone's eyes, left Si Yuchen in despair.
Si Lingtian thought of the fact that Si Yuchen and Gu Xiaonuan were married when he found out that Gu Xiaonuan went to the hospital for a prenatal checkup.
That Si Yuchen would keep secrets from him was also within his expectations.
Si Yuchen didn't trust Si Lingtian; he also harbored suspicions about Si Lingtian's persistent intentions to push him to get married.
Moreover, Si Lingtian's impressively good impression of Gu Xiaonuan led Si Yuchen to contemplate a lot. This wasn't mere suspicion, but doubts Si Yuchen had after considering many things.