What does San Pedro cactus smell like when cooking?

My frind brought over a san pedro cactus. It seems like it went bad...i was not brown, but the color was kind of dull and the inside was mushy. We are cooking it and the whole house smells disgusting. Is this normal or should ee dicard? The odor is terrible! I know it is supposed to tast bad but is it supposed to stink too? Like straight up a$$... unwashed feet....terrible. help! I dont want to discard if its ok, but i dont want to get sick either....