You see, this is what comes of it when you spend so much time impaired by drink. Some part of us remained in King's Landing, no one has been abandoned.

[Although he is not wrong, she had not considered the war when she asked her question, and likely even if their presence here meant they had vanished from Westeros entirely she would not feel so badly about it. Alicent is too relieved to be free from the stress of the war, the fear, to fully be able to hide it. If anything, she just feels sympathy for the version of herself left behind.]