3 monks and 3 demons want to cross a river

3 monks and 3 demons want to cross a river. The boat can carry at most 2 people (someone must row it). On either bank, if any monks are present, demons must never outnumber them (or the demons overpower them). Krish thinks this is completely impossible, since the boat only seats 2 while 6 people need to cross. His sister says it is possible with the right order. Who is right?