Tony : The first time you saw him smile was when you said you wanted to have your own personal iron man suit.
You: hey Tony
Him : yes sweet cheeks
You: I want my own iron man suit so we can fly around together
Him : are you sure ?
You : absolutely
Him : yes ! I can't wait to start making it ( does a little dance )Bruce : The first time you saw him smile was when you graduated college with your PhD in Behavioural science .
You : Oh my gosh I'm so excited I can't believe I did this .Him : Oh Honey I am so proud of you and all you accomplished. Now you can be anything you want
You: Thanks Brucie, but I couldn't have done it without your support .
Steve: When you saw him smile was when you told him you got the job you wanted .
You : Steve , Steve guess what
Steve: what is it darling?
You: I got the job I really wanted
Steve: That's amazing darling I am so proud of you
Bucky : The first time you saw him smile was when you and the avengers threw him a surprise party for his birthday.
You : Come on sergeant we are going to be late if we don't get a move on it .Bucky : Okay doll I'm coming where are we going anyway
You: it's a surprise you'll just have follow me.
Bucky: You know I hate surprises
You : I know
Several minutes later
Bucky : um doll why are we at Starks tower ?
You : Just open the door love
He opens the door and all the avengers pop out shouting surprise
Bucky : You guys remembered
Steve: of course we did.
Bucky: Thank you guys so much this means a lot to me .
Sam : The first time you saw him smile was when you said I love for the first time.
Tchalla : the first time you saw him smile was at your wedding when you were crowned the Queen of Wakanda
Clint : When you saw him smile was when you told him that you were going to move in with him . He couldn't wait to share a house with you because you are the love of his life.
Pietro: You first saw him smile when you accepted to be his girlfriend. He was so happy when you said yes to being his girlfriend. A huge smile stretched across his face and he ran over to you and picked you up and spun you around . It was the cutest thing that the avengers ever saw. Bucky and Wanda both cried because they said it was the sweetest thing ever.