Captain America does, however, have two children, James Rogers (Earth-555326) from the animated show (and later on comics) and Sarah Rogers (Earth-9811), from an alternate timeline of the original Secret Wars - Wikipedia. read more
Ultron took the bait and attacked with his Iron Avengers, each of the children facing the iron-imitations of their parents. James fought against Iron Captain America and Iron Black Widow. During their fight, James' shield generator was damaged, but managed to take back the original Star Shield from Iron Captain America. read more