See, I thought about that, because I said specifically how no matter how little friction there is, an object cannot move without any force pushing it.
However, and I tell you this honestly. The cup moved as I was going to get the milk from the fridge. The cup was stationary for approximately 45 seconds. As I closed the fridge door and went towards where the cup was positioned, that's when I saw it move.
I was never having tea with her. She was having tea, I was talking to her, she drank it and basically said to me, "what the fuck is this shit".