ok
let me break it down in little pieces.
Guy in the story P(perpetrator) wanted to fuk S(sister) and B(brother).
And he did in frindly manner.
now B was being litte too sister “friendly”.
NOW explaing US (protective brothers)-- some time we have to see beyond what our high on BollyWood sisters “feel” and we do what it right.
Normally our sister get married and live happly life and can’t stop loving US.
Since getting married is the ulitmate goal of women we should call them successful girls.