After Iron Man left his daughter's room, he went to show off to his wife. I can see that Iron Man loves his daughter very much, and I feel very warm when I hear this.
Eggs behind "3000"
There is a kind of digital terrier for children in America, which is also a slang terrier. Parents say "I love you" to their children, and the children reply "I love you too", and this too is homophonic with two, so parents will say "I love you three", which means that they love you more.
So when Dan Sony said "I love you" to Morgan, Morgan directly said "I love you for three years". And the sentence "I love you three terrible" is actually an actor of Iron Man, and what Robert Downey Jr.'s daughter said to him was later added to the lines.