My boss had the nerve to ask me to do work related activities on the way home when I would not get paid for it

So I work in retail as a retail assistant but I am the main person at my store because I don't have an active manager on duty at my store, it's sort of my job. I just got back from holidays and my boss called me this morning and asked me to do work related activities on the way home each day. Like hell will I be doing that, especially unpaid. The nerve of this company. I hate it here so much.