Friday evening, I put ds 3 school T shirts in the washing machine along with another white t shirt. That was all as it was the only whites I had to wash and they needed doing for school the next week. Wash basket was empty other than 2 coloured towels as I'd done everything else. Feeling good and very organised for a Friday night, until the wash had finished I was hanging them to dry on the airer over night. Another t shirt had appeared I didn't recognise the size or the pattern I could see, it was inside out, so I glanced down the neck, quickly turned it the right way round and nope, never seen the t shirt before in my life. A river island woman's t shirt, 100% not mine, I've never set eyes on the shirt before. Someone please help me stop thinking about this as it's driving me crazy. There is no explanation as to where it could have came from at all!!