Elena had never thought of it that way, but it was true. Damon wanted her to be with him and Stefan wanted her to be with him. While Damon knew--or thought--that Elena wanted to be with Stefan, that didn't change the fact that he wanted her. Katherine was right, they could only imagine it the way they wanted it and anything else wouldn't seem right to them. Even if it wasn't her ancestor that she was with. Even if it wasn't even the girl who had scorned them.
That still didn't mean she was looking any more forward to telling them. She didn't want them to hate her. She still cared about them very much.
Katherine distracted her thoughts very easily, however. Once Katherine was on top of her, she let her thoughts move from the possibility of telling Stefan and Damon about her and focused on being with Katherine. "At least you admit you're selfish," she said before Katherine's lips met with hers again. She kissed back as she felt Katherine's hands along her sides. She reached up to link her wrists behind Katherine's back as though keeping her close to her.