Ewwww ! Max mentally puked but the image of Alec and some random girl necking in bed suddenly sent her heart racing . She realized that for some reason she was not happy . The tightness in her chest did n't help either .

Question: What may be the reason why she is not happy ?
Answer: This other person is n't good enough for him .She has feelings for Max .They were hoping Max was n't over her yet .The other person is their sister .