Fred/Helena and whoever else is good people!
She thought she had sipped it slow. Apparently though, she had been mistaken, or just not ready and therefore let the after effects of such a cold drink slip by and take hold of her. "I will remember not to do that anymore then." She tilted her head back and smiled up at him when he put the jacket on her shoulders. Using both hands, she pulled it tight around her, already beginning to feel a little more comfortable.
"Oh, I most certainly will." Feeling more comfortable with herself, she was able to joke a little more freely. Her smile returned as well.