Home alone together for the very first time, Nathalia and Tyler are made to work past their awkward situation: they're newly made adult step-sisters who just moved back home after college. Slowly we see hints of Tyler's lust for Nathalia, espceially her scent, but she knows it's wrong. But after being a little loosened up after a night out, Tyler makes her first move by licking Nathalia's armpit.