So what you thought to be willingly obliging your parents and maintaining peace and also in a certain way keeping them happy as well, you realise it was nothing of the sort. Rather it was more like becoming a victim of excessive possessiveness felt by a set of parents towards their only child, and worse so, towards their only child who is a girl.
And it all comes to the surface when that only child, whom they thought they would mould and protect from any kind of "external"influences falls in love. They are disturbed by this sudden change in her loyalty - change and loyalty may not be the right words to use but then that is what that's been rocking their lives.