Johnny Yuma 1966 Spaghetti Western

Conniving wife (Neri) has her husband murdered and finds herself butting heads with his heir and nephew Johnny Yuma (Damon). The woman then enlists the assistance of her ex lover (Dobkin) who is a professional gunslinger to kill Johnny. When she tries to double cross the ex lover, he and the heir team up and kill her bodyguards. The lover is killed but just before he dies, he sabotages her water supply. She flees across the desert but is found the next day having died of thirst