Hebe

Hebe is the goddess of youth, daughter of Zeus and Hera.

History
Hebe is one of the few children the married couple have had. She is the goddess of youth and performed the job of cupbearer to the gods, until she married Hercules; then she was replaced by Ganymede.

When Hercules became a god and came up to Mount Olympus, she and Hebe got married. This definately upset Hera, her mother, who had tried numerous times to kill him because he was her husband's illegitamate child, from when he was born to when he became a god.

So Hebe must have loved Hercules, and possibly might have been watching his adventures from her place in the sky. They must have been very happy together, as Hercules isn't mentioned to having any demigod children, and must be happy to this day.

Hebe granted Iolaus' wish to become young again in order to fight Eurystheus, showing herself to be generous and kind.

Hebe had two children with her husband Heracles: Alexiares and Anicetus.

The series
Hebe doesn't appear in the series, but she was probably on Olympus when Percy, Annabeth, and Grover went there.

Hebe has a cabin in Camp Half-Blood as of the ending of The Last Olympian, whether hers has any children or not is not mentioned. If she does, the relationship she has with Heracules, might not be a happy one after all.