Borivali - There may be no relationship that's closer, finer, sweeter, happier, filled with joy than the relationship we have with our brothers and sisters. A heinous incident took place on 7 December at 6 am in Borivali, wherein two brothers attacked their younger sister with the knife in a recluse dilapidated building near IC church. Sister (19) came to Mumbai a few days back from hometown. Sister had an affair before the incident to they had a fight and she went to a relative's place. Brothers after attacking sister left from the place, a passerby rushed her to Shatabdi hospital on the immediate basis. Both the brothers have been taken into police custody by MHB police station. The girl is still in serious condition.