In love with my tour buddies' sister

One Direction is going to be going on tour with the four boys from 5 Seconds of Summer. Their girlfriends, some of the 1D boy's younger sisters and one of their' sisters friends will be touring with them and 5sos. Do the members of 5sos fall for the sisters and their friend? Does it get hot or awkward? Is someone being teased? Does one of the boys get protective? Read to find out.