can your siblings take a little missing oxigen. cus if they can when they bout to snitch put your hand over there mouth and pinch there nose this will make them unable to breathe you wisper "if you snitch I will make you pass out." and if they start licking your hand, pinch the in the gut and say "if you dont stop I will pinch harder" but if they cant take that just cover there mouth and put them against a bed or couch. with your other hand grab there fingers and bend then until they are screaming. : )