As for the spouses seeing each other’s private parts or area, there is no prohibition. As a matter of fact we have narrations that both the prophet (peace be upon him) and `A’ishah used to bath in one big bowl.

 

As for touching each other private parts or area, there is no prohibition.

 

In your case, you have to understand that the blood is filthy and if not washed will not permit you to perform prayer. Also some scholars declare that touching the spouse’s private area will revoke wudu’ so keep that in mind.

 

On a final note, such an area in a female is usually referred to in an intimate relationship and it is not permitted to be touched during menstrual period for that purpose of intimacy. I am not sure what necessity is needed for her to be touched during her period for any other purpose?

 

Allah Almighty knows best.