雪子(ゆきこ)が極めて(きわめて)内気(うちき)で、自分の意思(いし)をはっきりと言わ(いわ)なかったから

The third sister, Yukiko, was an extremely elegant woman possessing the classical beauty of a traditional Japanese woman, but because she was too introverted and did not state her intentions clearly, her matchmaking proposals fell through repeatedly. The second sister, Sachiko, and her husband ran around seeking a good proposal for her sister, setting up matchmakings at luxurious hotels and Japanese restaurants, but struggled due to the suitors' lineages and Yukiko's attitude.