Aunt Lan Hua used the excuse of an upset stomach to squat in the outhouse for a while. Though it's not elegant, it beats other excuses.
She had thought it through: if she used some excuse like going out for an errand or lying down due to feeling unwell, Yang Dong might find it inappropriate to be alone with just the girl in the room and would leave directly.
If she said she had a stomachache and went to the outhouse, it implied she'd be back soon to join them for dinner, making it hard for Yang Dong to leave.
Sure enough, Yang Dong spoke up, "Alright, Aunt, go quickly."
Actually, Yang Dong hadn't planned to leave at that moment. It was better for him if Aunt Lan Hua left; he would then have time to probe Yang Xiaocui.
Aunt Lan Hua left cheerfully, believing that her plan would surely succeed.
The room was suddenly left with only Yang Dong and Yang Xiaocui.
It was already dark, and although a candle was lit, the room was still very dim.
