"Cassie brought up something we need to talk about and I’m going to go out on a limb and say it because it’s making me crazy and I can’t even be engaged," Dean explained to Brooke quickly.
Brooke’s heart was thundering in her chest. “…what?”
"I’ve never thought of you as my sister," Dean found himself saying, sighing and shrugging. "I just…I tried to so many times, but I had a thing for you before our parents got married. Then I tried to bury it and then it just got deeper when you were in New York and I realized how much the distance was killing me. Do you know how many of those magazines I burned?"
"Why?" Brooke asked, not able to ask anything else as her body flushed at the words.
"You think I liked seeing that you were screwing other guys?" Dean asked her, suddenly a little angry. "God, I was dying. Then you told me that things were great and you were going on a date and I proposed to Cassie because I thought I needed to face facts: I’d never have you."
Brooke nodded slowly, Dean looking her in the eyes again. “Even if I felt the same way…Mom would not be pleased to hear any of this.”
"Did you just say ‘even if’?" Dean asked her, reaching out to cup her face.
Involuntarily, Brooke closed her eyes and sighed with relief, resting her cheek on his hand and just nodding. She knew that Dean could read body language and before she knew what was happening, she felt his hot breath on her face. Her eyes opened just in time for Dean’s mouth to cover hers and suddenly she felt like she was just going to melt right into him. Dean was kissing her and he was kissing her like a woman and not like his little sister, which in retrospect was good, because his tongue was teasing the corners of her mouth and you didn’t kiss a sister like that. - Forbidden, chapter 5