i feel most of the relationships here are quite complicated

yes. I remember about your telling about a cousin of yours getting married and the new bride could not have healthy relationship with her sister in law. Nowadays before marriage is fixed -- girls tell that in-laws should not reside with them. This is not only in respect of cases in India but in respect of marriages with a boy working in usa -- some girl tell like this. girls do not have tolerance and are very adamant nowadays. Prashu may be an exception.

haha,thank you so much. yes i agree , with you saying, because, i know a boy ( my cousins friend) who works in Banglore , got engaged with a girl,from his home town she works in Hyderabad. After the engagement , she started showing all her true colors, she kept some conditions like, the boy should not go to movies with his friends, but she can go to movies along with her male colleagues, she also said that she agreed for marriage only because he don't have sisters and some other non sense, the boy , to my surprise, bared everything for few days, but at last , told his parents that the relationship cannot go further, first the parents thought ,that's its just some small quarrel, but later the boy was so serious and finally the engagement broke. Now he is happily married to another girl and have a beautiful daughter.