As she spoke, he looked at her fondly, smiling as she talked about wanting her own place, chuckling at the idea of her being married off and even more at the idea of his being a Muggleborn fitting into her fantasies. He wasn't fazed by the statement that her father was a death eater, though he did acknowledge it with a nod. After she was done, he moved up to kiss her before answering the same questions.
"I want joy, and love, and to experience the most wonderful things in life. I dream about sex - quite often, actually - but more than that, I just dream that everyone I love is happy. And as for deepest, darkest fantasies... well, I've always fantasized about being tied up in a room full of men and women and being used as a sex toy."
He had to kiss her again, and he did. All this talk of sex was reminding him of all the wonderful things he wanted to do to her.