Started a new job at the weekend, teaching a girl with dyslexia in her home. We were working away and the mum offered me a cup of tea, I said ‘No thank you, I’m ok’ in a nice way. She looked at me quite strangely…was this rude, is it rude to turn down a drink in another’s home? (I’d brought a small bottle of water with me as I have a cough and had already had coffee that morning, not long before)