Thing is, crescent1325, that we don't know for certain that Willowgreen is Kahvi's mother. It seems very likely, but who can say? And Yun is Skywise's daughter. She was probably conceived during the war dance, or while Skywise was staying in the Palace, which is pretty immediate conception for an elf. Perhaps Kahvi just knew that if she was Rayek's main squeeze for a while, it'd be an odds-on bet.