I(24m) work a financial-based 8:30-5 office job. My boss is kind and I have respect for her, and my pay is not bad for a first job with great benefits. Out of nowhere, she called me into her office and announced to me that I'll be issued a work phone and expected to be on call after work and on weekends starting next week. This was not in my job description and not in my contract. I wasn't sure what to do so I just sat there and nodded in confirmation that I understood her expectations. What should I do?