Be My 'Fake' Fiance? {Hetalia Fan-fic}

Madeline Carriedo needs to find a Husband, and Gilbert Beilschmidt needs to find a wife. Now his father has cancer and has 6 months to live with one wish, to meet the women that will be his son's wife. So Gilbert tells his father he is engaged to his best friends little sister Madeline Carriedo, and they both have to play fiance, but for how long will they keep it up before one cracks.