during amazing intercourse, over half of an hour of playful sex, overflowing nonstop orgasms, ..."BAM!!", a strong pungent odor filled the room? & the fun came to an abrupt stop.

I am a 50 year old woman, and I'd have to say this may have happened one time before in my lifetime for no reason, no other symptoms of what may have caused this stench to fill the room & my partner & i took off into differet directions in the house to try to escape the monster dead fish that attacked us. I sprinted directly to the shower to thoroughly rinse out. i could not even bear to be near my own self. WHY? WHERE DID IT COME FROM? ...SOME TUCKED AWAY CAVE INSIDE... WAY DEEP INSIDE...?