Either Zeus has gotten into the lipstick (poorly) or some field rodent has very recently met a very bad end. I will note this does not appear to be Zeus’ blood in any event.
(For the people who are new and/or did not know, the Scalzi cats are all working cats, inasmuch as we have agricultural fields on three sides of us and thus have potential rodent problems in the autumn and winter, when the furry creatures who live in the fields decide our house looks nice and warm. Well, it is. And also, not for rodents.)