A friend related a story that happened when his wife redt a local girl to a bachur from our yeshiva. The girl's father passed away young and my friend's wife - I guess cognizant of the fact that it's often very hard on the almana, and potentially the girl as the oldest, or something like that - told the boy's mother that the girl is very respectful to her mother. This woman starts yelling at her, going off on a 10 minute rant: "How could you say such a thing?! It means the girl's mother is difficult! I had a difficult mother in law and I don't want my son to have to deal with that. Yadda yadda yadda." My friend said his wife was so upset, thinking she messed up the shidduch, and of course he told her, be happy, you saved this girl a potential nightmare.