Batfamily x sister reader

How they met her

Batman was on his last street before he went back home. He was about to call it a day when he heard a scream followed by gun shot. He hurried to the scene but was too late. There was a woman on the ground bleeding from her waist. Their was a random baby blue blanket next to her. He went to check the body when he heard a cry come from the blanket. He walked over to the blanket and checked inside. He saw a baby girl laying there. He was shocked. The called Commissioner Gordon and took the baby back goth Batcave.

Time skip

Bruce made it to the Batcave and jumped out. He carried the baby girl out of the care and took her inside the medical room. Alfred was the first to notice the baby.
" Master Bruce, why is there a baby girl in your arms?"
" Alfred, I found her after her mother was shot dead. I decided this place needs a girl. For once."
" Very well then sir. But may I ask, are the boys gonna know about this now or later."
" I'll tell them tomorrow during dinner."
" Very well sir."  Alfred soon walked away.
" And Alfred."
Alfred stopped at his tracks and faced Bruce.
" Yes sir?"
" Can you set up a room for my new daughter."
" At once sir."  Alfred walked away to the manor and to an empty room to set it up for the newest member of this fast growing family. Bruce soon came up to the room and placed the child inside a crib Alfred found for when he was a baby and tucked her in.
" Goodnight my daughter, tomorrow you'll meet your brothers. He kissed her forehead, walked over to the door, turned off the lights and closed the door shut.

Time skip

It was morning and Dick Grayson, the eldest of the bunch, woke up early to watch some movies. He was excited to hear the disney made Disney+. Now he could watch all his favorite old movies. He was in the middle of watching Lady and the Tramp when Jason walked in.
" Morning jaybird."
" Mhm."
Jason walked to the kitchen for breakfast. Soon all the members were in the kitchen for breakfast. They ate pancakes with bacon. Damian just ate the pancakes since he's vegetarian.
" Ok kids, I have an announcement to make. I was gonna wait till diner but you need to know."
" You finally found love" Jason said  
" No Jason, you all have a new sister."
Everyone stopped in their tracks. Dick looked up from his plate and smiled.
" A new sister I could watch Disney movies with." Dick said With excitement. He then stood up followed by Damian. Dick then walked over to Damian.
" Come on Dami, lets go find her."
Then Dick picked him up and ran up stairs. Jason soon followed them. Tim stayed to finish his food. What. He's not wasting food. Bruce was happy to see his kids happy for a sister. Soon he heard bangs and yells up stairs. Soon Dick came down with Jason over his shoulder while he was holding Damian that was holding his new baby sister in his arms. Alfred quickly walked over to them and took Damian out of Jason's arm since Damian didn't want to let go. Alfred set Damian down and the boy walked over to the couch and sat down with his baby sister on his lap. Dick came and picked up Damian and set him on his lap. Jason then sat next to Dick and took his sister in his arms. Bruce was just happy that his kids fell in love with her.