Complementary. The complementary infinitive is used after a verb whose meaning is not complete by itself, e.g. “I want to ride a horse.” The complementary infinitive is usually used with posse, velle, nōlle, andmalle.
As king of the gods, Jupiter would seem to be a great catch for any woman, right? Well, sure! As long as she doesn’t expect him to stick around, be faithful, save her from Juno, or protect their children… http://www.theoi.com/Olympios/ZeusLoves3.html