Both snakes have now officially gone off feed. The female hasn't eaten for a week and the male hasn't eaten for nearly two. I can't remember the female ever refusing food, she even eats when she's in the blue phase. Comparing her to the pregnant snakes I've seen pictures of on this forum, she's still relatively skinny, though.
I suppose this still belongs under this topic, even if it's on the fine line between breeding progress and the lack thereof.