The next morning

Ciel stirred slightly as his body told him to wake. He felt so comfortable and something near him was warm. He moved closer towards it but to his surprise it cuddled closer to him. His eyes shot open looking at what he thought would be a little girl.
Well it was a girl but she wasn't little anymore. She was at least his age and in simple word, drop dead gorgeous.
Feeling him move she opened her eyes slowly. They just stared at each other. A blush crept up on Ciels face.
"Who are you?" He asked scooting away slightly.
"Lily" she said sitting up, the strap of her now short silver night gown falling over her shoulder.
How is this girl Lily!? He thought as he stared. Lily pulled her long hair over her shoulder, combing it out with her fingers.
Ciel blushed at the sight. She was beautiful. Her body was curved just so and her face, like her fathers, was slender and well defined. Almost a complete transformation of her former self
Before Ciel could get another word out, Sebastian entered the room.

"Good morning young master... And daughter?" He said slightly confused.
"Good morning," she said as if it was perfectly natural for her to be in his masters bedroom.
Standing up she kissed her fathers cheek and headed out the door say she was going to get dressed.

"Sebastian do you have an explanation for her little "change"." Ciel said as Sebastian dressed him.

"Lily's appearance can, at times, fluctuate by how she feels. She can control it but sometimes it just happens. For example, when she's lonely she becomes a little girl. what you saw was her normal form. She's only about 200 years old . I don't get to see her much and she misses me when I'm not home. Which is about never."

"Home?" Ciel questioned

"Indeed young master, I have a home in which I raised her before I encountered you. I feel I'm a bad father I can't remember the last time I celebrated her birthday with her," he frowned pulling on ciels shoes.

"I'm going to go make breakfast for you. It a beautiful morning so you can have it outside," he said as he left.

Walking out of his room, he was gifted the sight of a now dressed lily. Her simple black dress hugged her body as she's walked with a black book in her hand.

"Would you like to join me for breakfast in the garden?" He blurted out as she passed.

"Sound invigorating ," she said not even looking up from her book as she walked down the stairs.

I know short but I didn't have a lot of time to do this but I wanted to get it out. Hope it was good. If so tell me about it.

Love ya  firebird