Não consegui entender estas frases...

Me ajudem a entender estas frases: 'His choice fell on a widow lady, of a proud and tyrannical temper, who had two daughters by a former marriage, both as haughty and bad-tempered as their mother.' 'She could not bear her step-daughter's good qualities, that only showed up her daughters' unamiable ones still more obviously, and she accordingly compelled the poor girl to do all the drudgery of the household.' 'Yet the poor thing bore this ill treatment very meekly, and did not dare complain to her father, who thought so much of his wife that he would only have scolded her.'

O que quer dizer 'fell on' nesta frase? Não entendi estas partes: 'that only showed up her daughters' unamiable ones still more obviously' e 'who thought so much of his wife that he would only have scolded her.