"Why not?" she returned with a real frown this time. "It's my blood, and if I want to give it to you..." Cara's frown because a little petulant. "Then I will."
And nothing would stop her, either, not even Colin. They were both too stubborn to let things settle peacefully.
Nevertheless, she added with a slight sigh, "Anyway, it's not something I plan on doing very often, so you should enjoy it while you can." Her hand gestured to the container. "But, I thought this was a bit of a special occasion, so...I splurged." She spoke of the blood as though another woman might a new pair of shoes.