I'm also doing Naraku, I'm edging around that problem by doing two versions, one just the full clothes, ignoring the spider, and the other all tattered. I seem to remember in the books somewhere when the back of the outfit gets slashed, thus revealing the spider, but the clothes didn't fall off. Which is the important bit for us girls.
Things need not have happened to be true. Tales and dreams are the shadow-truths that will endure when mere facts are dust and ashes, and forgot.