I do not believe I've assuming anything regarding the panties and joggers in the bucket/s, as AE stated in her statement that the contents of this bucket/these buckets smelled of blood.
AE qualified this statement by referring to this blood as menstrual blood, but I believe that AE was mistaken about this.
In my experience, the amount of blood staining that you might get with menstrual blood is minimal and the same is true of the smell of this menstrual blood once items stained with it are soaked in a bucket/buckets of water.
Menstrual blood does have a distinctive, hormonal scent to it (sorry about this, chaps), the hormonal content, however, and the menstrual blood are washed out and highly diluted once items stained with this are soaked in water.
The effect of this dilution is to remove any smell that the bloodstained areas might previously have had.