An interesting question one that many would have difficulty in ing. I therefore give you an from a Mormon point of view. First let me state that there are no women who hold the title of Goddess. The wife of a God only shares in the blessing which her God husband possess.
Now let me try and explain, again from a Mormon understanding. Gods do not die for they are immortal. Let us take Jesus the Christ as an example to your question. He came to earth as the first born of his father in heaven.(Remember Mary was carried away in the spirit and bore a child)) While here he taught the gospel, healed the sick and did all that his father had commanded him to do. He did not falter in those responsibilities. When he returned to his father after his crucifixion he was a God in his own right. He had earned that title.
There are other religions that recorded in their scriptures that the Gods and Goddesses came upon the earth (took birth) from time to time in the service of their devotees. It is also recorded that at their departure (death) they consciously exited the body as pure energy and returned to their appropriate spiritual realms.
Gods and goddesses don't 'become', they just 'are' that from the moment they appear.
The Greek gods and goddesses are immortal and ageless, they never died.
The ancient Egyptian gods and goddesses did not die in ancient Egyptian mythology.
Major Gods and Goddesses of GreeceThe major gods and goddesses of Greece were:ZeusPoseidonHeraAphroditeApolloAresArtemisAthenaDionysusHephaestusHermesDemeterHades
It's impossible for a mortal to become a God
Any human was afraid of the Gods or Goddesses
Greek gods, and goddesses drank wine.
All along. Gods and goddesses were born as gods and goddesses and remained gods and goddesses throughput their immortality.
There are twelve main gods and goddesses(the Olympians), but there are lots of other minor gods and goddesses in Greek mythology.
there were no deaths of gods and goddesses because they were all immortal
There were 37 gods & goddesses in Ancient Greece
She has worked with other gods or goddesses but they are not told.