Secret relationship takes a quick turn after a marriage

Charlie and Nadia's (Oliver Davis and Aften Opal's) parents have just married, making these two teens stepsiblings overnight. What their parents don't know, however, is that Charlie and Nadia used to go out. They've kept their past relationship a secret, not wanting their old flame to extinguish their parents' new one... But after moving in together, they can't help but feel the old pull of their past attraction, luring them together- try as they might to keep these thoughts at bay. They resolve to do whatever they can to not think about each other that way. After all, their parents' relationship is what matters the most. Who are they to get in the way of it? They can surely control themselves... can't they? But they quickly realize that as much as they can try to ignore each other... ...