Poppy is your new half sister now, since her father married your mother...but obviously you didn't consider her as a sister and at the same time she didn't consider you as a sister either...You two didn't like each other and at any opportunity you fought for stupid reasons... your mother and Poppy's father were already tired of these arguments between you two,so they decide to spend the whole weekend at the beach and leave you and Poppy at home to sort things out, at this moment them were saying goodbye and leaving

"Great, I'm locked up all weekend with you" she says irritably while rolling her eyes