Nyorai kupfuurira kweiyi ndima - Beltrán de la Cueva, zvisinei, anozivikanwa zvikuru nokuda kwokufungidzirwa kuva neukama nomudzimai wechipiri waHenry, Joan wePortugal. Kwakanga kune runyerekupe rwokuti mwana bedzi waHenry, Joan akaberekwa naBeltrán uye kwete naMambo amene, uyo angave akanga asingagoni kuita chiito. Runyerekupe urwu rwakaita kuti pave nehondo yemakore mana yeCastilian Succession
, iyo yakakundwa naIsabella I, hanzvadzi yaHenry yokurera. Hazvingabviri kuti kubvumirana pamusoro pevabereki vangangodaro vaJoan kuchasvika kune vezvenhau, sezvo pasina uchapupu hwakakwana hwokutsigira chero baba vangangodaro vane chokwadi. Zvizhinji zvezvinyorwa zvemazuva ano pamusoro pesimba raHenry zvinopokana, sezvo zvinyorwa zveumambo zvehutongi hwake zvakanyorwa kana kugadziridzwa pasi pesimba raIsabella, uyo kufarira kwake pachake mukugara nhaka kwakamuita kuti atore marwadzo makuru kuti asimbise kuti Joan aive asiri pamutemo. Kutaura zvazviri, Isabella ainyanya kufunga nezvaHenry achiedza kukanganisa mukurumbira wake kuitira kuti atsigire kutonga kwake. Mubvunzo wababa vaJoan, somugumisiro, wakafadza vanyori venhau dzakaitika kwemazana emakore: kana Joan akanga asiri chaizvoizvo mwanasikana waBeltran, uye akanga ari chaiyeiye, kutonga kwaIsabella kwakanga kune simba zvikuru kwaizova kupamba zvisiri pamutemo.