In fact, even a woman, if she has cheated on her spouse, may not be sure who the true father of her child is. Even after the mother has passed nine months of pregnancy and the agony of giving birth, there is no absolute assurance that after the infant was born it was not switched for another.
事實上，就連母親本身，如果曾經紅杏出牆，也可能不確定誰是藍田種玉者；即使懷胎 10 月、經過產痛辛苦生下胎兒，也難保孩子在呱呱墜地後是不是曾被掉包？