i think its also about the kind of intention/thinking the girl has towards her in-laws.
like its important for the girl to realize that if you move into a new house and have new relations all of a sudden, then the onus is on you to make a place for yourself in their hearts. like with your parents that kind of love/respect comes naturally, but with ur in-laws we have to work for it to deserve it.No one is going to come and offer you something just like that. the initiative has to come from the girl to realize this and put the effort. ghar mai jagih banana asaan hai..dil mai jagih banana is the difficult task.
and then i definitley believe after couple years, the hardwork/good intention realllyyyy pays off!!!!