Norma at Teatro di San Carlo

Norma is an opera by Vincenzo Bellini.
We are in the time of the Roman occupation by Gaul. Norma is a priestess of Gaul, but was also the lover of the consul Pollio, with whom he had two sons.
A young priestess Adalgisa, Norma tells of not being a virgin and asks Norma to dissolve the deal he made with the divinity. Norma is in the same situation, then accept the request. Then when he discovers that the man of Adalgisa is Pollio , Norma wants to kill himself but says he will convince Adalgisa to Pollio back to her...