Unexpected

Im whose?

We all got into the car that Mr. Weasly and Mrs. Granger-Weasly owned. Then they started asking questions like where I meet Rose. what house I was in. They also asked a question I did not know how to answer.
" What's your Mum and dad's name?" Mr. Weasly asked.
" My mum's name is Lavender but I dont exactly know who my father is," I said. They just looked at each other. No one said a word the rest of the car ride. When we finally got to the house I was told me and Rose would be sharing a room. 
" Wanna do each other's hair and make up for tonight?" Rose asked.
"What's tonight?"
" My family and family friends throw a huge christmas eve party every year."
" oh in that case sure." Rose didn't do much with my long curly red hair. She said it was really pretty so she just left it. But she did do my make up. After she finished me I looked very pretty so i did the same with her. She put on this sweater dress with leggings and I put on this red sweater dress with leggings. We looked really good.

When we finished Mrs. Granger-Weasly called us down so we would go to the party. On our way down my black high top came untied so I bent down to tie it an i over heard Mr. Weasly on the phone talking to someone. They were talking about me. This is what I over heard.
" Why didnt you tell me about you having riley." I think he is talking to my mom.
" So is she?" Silence. " Why the Bloody Hell didnt you tell me!" Silince again. " Atleast I could of told my Wife that Tiley was mine so that she didnt have to find out when Riley got into the damn car!" Wait what I am whose.
I finished tying my shoes and walked down stairs like I didnt hear thet Mr. Weasly said that I was his daughter. Is it possible he was lying? Dose my mom know that he is my dad? Is that why she didnt tell me who my dad was so she didnt ruin his perfect life without me? Can I really be related to my bestfriend in the whole wide world? How is this possible?