So recently in my company one of my colleagues has taken it upon herself to start carrying out tasks that are associated with my role. I completely think she's doing it out of the goodness of her heart and genuinely wants to help. Lately she's been sending reports to management about it, asking to have access to certain tools and having chats with them. I'm just a little concerned that it's going to look bad on me, as if I'm not doing anything. We have appraisals coming up soon and I want to mention it, but I don't want to come across as bitter. I also don't want management to say you're not doing your job properly. I think it also needs to be pointed out is that my colleague is like the golden girl of the department and definitely the manager's favourite. My manager will make more time for her than anyone else - this is not just me saying it, others have said it to me as well.
What do you guys recommend? I'm thinking about saying we need further clarification as to who is responsible for what. Any tips will be greatly appreciated. Thanks :)