Thanks mate, it did.
Joking aside, as you liked my other suggestion, what about this? The child asks why mummy isn't eating, and why you're failing to not eat, and you just word it in a way a child could understand?
"Me and mummy think the god we believe in doesn't want us to eat in the day time. Why? Well, it's a religion. Like, you know how some people are christians? They believe their god, who is actually our prophet Isa...yes, really, their religion tells them prophet Isa is god, but they call him Jesus. And hindus believe in lots of gods, and they have a party in Autumn. The festival of lights. Hindus call it Diwali, which is a bit like Eid for muslims or Christmas for christians. And they believe this, and they believe that, their god, and their god, etc. Now, just like they believe in the gods of their religion, mummy and I also believe in the god of our religion. And, like I said, we believe that the god wants us to not eat during the daytime. Yes, that's right, there are lots of religions and different people believe different things. Well, no, we can't prove it's true, but that's religion. Religion is believing in things you can't prove for a fact."
Too on the nose?