After I finished round 1 with an SP, she asked to use the bathroom and I brightened the lights, I then noticed a few blotches on the white sheets. They weren't very conspicuos, I may not have noticed them if they weren't white sheets. They were small blotches , kinda in a grayish color, no real distincive color, maybe even like a light coffee color. I don't know anywhere else they could have come from. When the lights were dim, I barely noticed them.
Would it be obvious when a women is having her period. Would the staining be more than a few blotches. She claimed to have had period the prior week. When I started to perform DATY on her earlier, it did have a weird taste, but that could always be for other reasons too.