In the end the DNA test showed that they weren't blood related and therefore they could get married and have children without having the whole neighbourhood gossiping about them.

DNA 是 deoxyribonucleic acid 的缩写，意思是"脱氧核糖核酸"，是构成生物遗传信息的主要分子，存在于所有生物的细胞中。DNA测试通过分析个体的遗传物质来确定血缘关系。