*Fast forward to Nina's birthday*

I wake up, barely have slept all night, been having the same vision of Nat and Tony dying over and over again. I didn't want to bother Steve so I slept in my own room, faking a good mood and a good night sleep. I look on my phone and saw it was only 6:30am, I sighed and got up. I looked in my closet and picked my outfit. I decided to throw my hair in a ponytail and have a no make-up day. "Enough make-up on my face tonight." I thought by myself, I grabbed my phone and walked to the kitchen.
The outfit:

When I got there it was extremely quiet. I looked at the time and it was already 11am. "Where is everyone?" I thought to myself. I was about to walk to the living room when I got a message.

"Huh? An assignment?" I thought to myself as I unlocked my phone and read the message.

"Well that's not hard." I thought to myself as I walked to Tony's workshop and on the door there was a sign. "To get in you must first solve the following riddle: I am no signs of good sins, my life is more than torture, if you mess up you'll get beaten up, its pretty much what sums me up. Who am I?" I smiled and messaged them back.

I walked into the workshop and looked around, there was a small box on Tony's work table with a note. "Happy 18th birthday my beautiful babygirl." I opened up the box and there was my baby bracelet with my name, made into a necklace. I took a deep breath before putting it on. I smiled and messaged again.

"Oh my god so easy." I said to myself and walked towards the training area, there was another sign on the door. "To enter this room you have to solve this riddle: sent to kill but she was different,
she reminds me of someone else but the past stays the past. Who am I?" About this one I had to think for a bit, I remembered the story just not the person. As I was about to give up it came to me, I gasped and messaged them.

I opened the door and it was completely dark in there. I used the light switch but it didn't work. I used my power to give me light and Tony stood right in front of me and I jumped. "Oh dear God dad. Don't do that I was about to attack you." I said as I put my hand over my heart. "Sorry sweet heart." He said as I turned on the light with my power, he walked over to me and hugged me tight. "Happy birthday." He said as he pulled away. "Thanks dad." I said and smiled. "Okay now go look around." He said and pushed me forward. I looked around and saw a custom made punching bag. I looked at Tony. "This one is made for your power specifically, Steve wouldn't be able to hit it without crushing his bones." He said and chuckled, I smiled and opened up the note. "Happy birthday Nina, love Steve and Nat."
I blushed a little. "Now I will accompany you and read all the clues to you for every room." He said and smiled at me, I chuckled and walked over to him. "I got this dad, you can walk with me but I like the scavenger hunt." I said and walked passed him as I messaged the group chat again.

I smile and walk up the roof, before I open the door there is another sign. "To enter this room you have to solve this riddle: On your left...  until the end, if you don't know the difference between good and bad guys you're an idiot, if they are shooting at you, they're bad. Who am I?" I laugh, "That one is way too easy. Do you guys not know I know everything about you guys? I can hear your thoughts remember?" I asked Tony and he smiled as I messaged the group again.

I open the door and see a full roof terrace with fairy lights, I look around and smile on one of the tables there's a note. "For when you need fresh air and time for yourself or just want to enjoy the view with all of us. X Wanda, Sam, Thor, Bruce, Peter, Vision and Clint." "OMG this is so sweet." I said as tears came into my eyes. Tony walked to me and smiled. "There is one more thing." He said as he grabbed my hand and pulled me with him. Once we were downstairs he blindfolded me and led me to the last spot. He took the blindfold off and I stood in front of my own bedroom. "Uh...no riddle or whatsoever?" I asked, he shook his head and motioned me to go in. I opened up the door and everybody was standing in my room. "HAPPY BIRTHDAY!" They all yelled and I laughed. "Thank you guys." I said and smiled. "That's not all." Steve said as he stepped forward he offered me his hand and pulled me softly in front of him, Nat took over my hand and Steve covered my eyes as I got led further into my room. Nat let go as Steve removed his hands and I gasped. "NO WAY!" I yelled and looked at all of them. "This is from all of us." Wanda said and I started crying. "I'm sorry, I'm just so happy, you don't even know." I said as I went and hugged everybody.
The final gift:

"Nina why won't you play and sing us the song you always sing at my place." Tony said and I looked at the floor, I'd rather not dad it's a pretty sad song." I said and played with my fingers. "Of course honey the play us a happy song." He said and I nodded, I walked to the piano and sat down. I took a deep breath and started to play. (Song of the video please imagine the music to be a piano😇) everyone clapped when you were done and some had tears in their eyes.