My gf spilled soda on her bed and asked me to hold her cup while she cleaned. I held the cup for a few minutes while she assessed the situation, then I set it on her nightstand by her bed when she left to grab cleaning supplies. When she came back inside, she got upset with me for setting the cup down. This is something I do frequently when she asks me to hold something. She will ask, hand me an item, and then go do her thing for a few minutes. I usually set it down and pick it back up to hand it to her when she’s done. Is this an unreasonable thing for me to do? She thinks that because she asked me to hold the item, I should hold it until she asks for it back. Her exact words about me setting the cup down were” I asked you to hold it, not the nightstand”. I think she is being unreasonable, but I recognize how it can be frustrating if it’s something that bothers her. Am I being an asshole about this?