
Fiance and family misunderstood her nausea towards food as a pregnancy sign (she just hates the dish in general).
She already was holding her stomach and acting sick due to her period.
She went through emotional trauma from evil guy, became bedridden for a short while.
Doctor examining her tells them there are no signs of pregnancy, they assume the trauma caused a miscarriage (wasn't any signs cause there wasn't any baby to begin with).
Kion laments that he doesn't want her to go through her pregnancy again due to stress, she's like "uhm what?" Causing the whole misunderstanding to come to light.
I sisnt understand the last episode