we are just learning about this in school! it doesnt matter what the boy wants. she doesnt have to know that because if she does then she will ust say what the boy wants to hear. rather say the truth in the least negative way possible but dont lie coz eventually the truth will come out and it could ruin the marriage which will lead to embarrassment for both them and their families.
after she says this however, she should remind the caller that noone is perfect and she should relay all the good things about this girl.