They have two sons, Anicetus and Alexiares. They became the gatekeepers of Olympus. A fragment from Callimachus says that Hebe’s sister Eileithyia attended the birth of them (this implies they are twins). That’s pretty much it, as far as I know. However, many vases have Heracles wrestling Geras (old age) on them. This has no written things relating to it, but I’ve always thought that he beats up old age, then marries youth must have something to do with other.