Rubuta ci gaba don wannan sakin layi - Komawa Portugal, Possoz ta raba lokacinta tsakanin ɓangaren Lapa na Lisbon, kusan koyaushe a cikin 'yar'uwarta Jeanne da abokinta Alice Rey Colaço, da gidan iyali a Estoril. Mahaifinta ya mutu a 1912. Bayan kifar da masarautar
kuma ta yi tawaye da ra'ayin mazan jiya na al'ummar Fotigal da kuma tsarin al'ada game da zane-zane, ta shiga cikin sabon motsi na zamani a Fotigal. Ta fara baje kolin a "Sociedade Nacional de Belas Artes" (Society of Fine Arts) a cikin 1909 kuma da sauri ta zama sananne, kasancewar ta kasance mai baje kolin yau da kullun a cikin salon shekara-shekara na Society har zuwa 1916. Hakanan za ta baje kolin a Humourist da Modernist Exhibitions daga 1913 zuwa 1926, tare da José de Almada Negreiros da sauransu. Ta kasance ɗaya daga cikin 'yan mata masu zane-zane na tsarinta don shirya nune-nunen mutum na aikinta, a cikin zanen mai, zane-zanen fensir, gouache ko ruwan ruwa. An gayyace ta don shiga ita ce kawai mace mai nunawa a cikin Nunin 2 na Humourists, a cikin 1913, kuma a cikin Nunin "Masu 'Yancin Kai Biyar" a cikin 1923. A cikin al'ummar da maza suka mamaye, Possoz an ɗauke ta a matsayin daidai da 'yan uwanta masu fasaha.