Cleaning toilet and peeing

I work as a housekeeper for an older man. He is very consistent with order, I have to clean very carefully and I must not use his toilet. But what should I do when it's hot, I have to tea a lot and then I need to go to the bathroom. I have to pee in his toilet, I have to keep quiet so he can't hear me. And I must not forget to wipe the droplets from the lid of the toilet ....