"Twenty-five and twenty-two. But don't worry, they've learned to listen to me over the years."

Peggy started them young, what can she say? She's fully expecting them to try and make Steve squirm a little bit, especially once they realize what he's like. But she can't imagine them not liking him. She can't imagine anyone disliking this man. (Except maybe Red Skull, but that's another story.)