Tony Stark :
( You allowed Peter to paint on your baby bump and this is what he painted.)
Bruce Banner :
( Natasha painted it )
Steve Rogers :
( Steve painted it for you )
Bucky Barnes :
( Steve also painted yours a long with his wife's )
Sam Wilson :
( Shuri painted your stomach for you and did a little extra )
T'challa :
( You had Bucky paint your baby bump for you and told him to surprise you.)
Clint Barton :
( Your sister Wanda painted your baby bump because she was so excited to have a little niece or nephew )
Pietro Maximoff :
( Both Wanda and Natasha painted your baby bump to surprise Pietro with how much it grew .)