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Xie Jingchen had made up his mind, and was devoted like a loyal dog throughout the meal, nearly hand-feeding her himself, which only made Yan Jinsu even more uncomfortable. She ate less than half a bowl of rice and then drank a bowl of soup, unable to eat any more.
Can Yan Jinsu say she's very nervous?
Although this body is that of a married woman and has already given birth to a pair of dragon and phoenix twins for Xie Jingchen, that person isn't the current 'Yan Jinsu'!
Yan Jinsu is a decisive person. Once she realized she had fallen for Xie Jingchen, and considering that this man was her husband, she naturally accepted his presence.
Even if she didn't accept it, it wouldn't work - could she possibly abandon 'her' own children? That's clearly impossible.
Therefore, rejecting Xie Jingchen's affection was obviously unrealistic.
Besides, no one is more aware of her body's true reactions than she is, the person involved!