I get the reason for the daily schedule, and since it's fictionlandia it's always wheee fun awesome sexytimes with the back-breaking orgasms and hot guys, but my biology brain is making O____o faces because it doesn't work that way. And the other thing is that they are relying on the old fashioned way of conception, when there are other options. Especially since they said from the start that faeries find it difficult to conceive. I'm gonna guess that Merry never visited a fertility specialist to see what her chances are? Which seems odd because she's meant to be the modern American princess that grew up outside the Sithen and its arcane ways.