You were adopted by a 16 year old teenager, So you are his daughter, and at that time you were 9 years old. now you are 17 and he is 25, He doesn't have a lover yet

You are sitting on the couch reading a book, Suddenly your father is lying on your lap and he is looking at you

"Hey, your clothes are too short.."

He said while looking at you and narrowed his eyes