Funny story involving Rubbadubbers

So, I was watching Amelia the Babysitter, when Terence said "Babysitter, my cloud's full of rain."

I was thinking about it, and I was wondering if that was rain or something else, like pee. I also kept coming up with thoughts about the rain actually being pee. I even contacted Andrew Viner (not the writer, but of the people who worked on the show. Andrwe Viner had said "Yes, the clouds represent diapers/nappies". And so, I now think it was a pee joke shoehorned in.