Nyorai kuenderera mberi kwechikamu chino - Musi wa1 Zvita 2013, referendamu yebumbiro remutemo
yakaitwa muCroatia, referendamu yayo yechitatu kubvira payakava yakazvimirira. Referendamu iyi, yakarongwa nesangano revanhu rinonzi "For the family", yakakurudzira kuti pave neshanduko yaizotsanangura wanano semubatanidzwa wemurume nemukadzi, zvichibva zvaita kuti mutemo urambidze kuroorana kwevanhurume nevanhukadzi. Milanović akaramba chikumbiro ichi ndokuudza HRT kuti aizoivhotera. Hurumende yakaraira vagari kuti vavhote vachipesana nayo, asi referendamu yakapfuura ne65% yemavhoti achitsigira, zvisinei, nekutora kwevhoti pa38% chete. Milanović akanga asina kufara kuti referendamu yakanga yaitika zvachose, achiti "Ndinofunga kuti haina kutiita kuti tive nani, vakangwara kana vakanaka". Iye akataurawo kuti referendamu haichinji rondedzero iripo yeroorano mukuwirirana nemitemo yeCroatia. Iye akazivisazve kugadzwa kuri kuuya kweMutemo paKubatana, uko kuchagonesa vanhu vane mitezo yakafanana yevatano kuumba mubatanidzwa we"kubatana kwoupenyu hwose", uko kwaizogoverana kodzero dzakafanana nedzeroorano chaiyo, kunze kwekodzero yokugamuchirwa. Musi wa12 Zvita 2013 Hurumende yakapa mvumo yeBill yakataurwa, uye Paramende yakapa mvumo yeLife Partnership Act muna Chikunguru 2014.