When Alec Coal finds out her stepbrother forbids him and his friends to hang out with her and her friends because she is fucking hot and Tyler doesn't want his friends hitting on her, she finds it extremely flattering. And one thing flattery does to a slut, regardless of her being your stepsister, is she'll put out like its the last time she'll ever have sex again. Furthermore, Alex is pleasantly surprised by the huge package her stepbrother had zipped up.