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Maybe Addison did n't have anything to do with it at all . " Ca n't get you alone , " he murmurs , and his breathing just keeps getting heavier and Derek can feel his hard - on against his thigh , not that he minds , but he does have a surgery in half an hour . And then he has dinner plans . With Meredith .

Why should Derek not be alone with Addison ?
Pick from:
[1]. Because he is cheating on the person is going out to eat with ..
[2]. Derek and Addison seriously need to find a room ..
[3]. Derek needs to be truthful to both Addison and Meredith ..
[4]. None of the above choices ..
[1].