(This is an education setting, not a business per se, so keep in mind some things work differently)
My coworker will be retiring in a few months, but is driving me crazy. Her personal tasks are becoming increasingly apparent on the job and she has done a few things that very much bother me in terms of ethics, in addition to the daily countdown of working days left. (I'm happy for her, as we have been friendly, I just find this annoying)
Underlying this is an (awkward for me) relationship with our dept of 3 people. Her and our other coworker have similar values (including both misusing sick time) and while they came more recently to the dept, feel that we have responsibilities in our workload that we shouldn't be doing. I am the dept head, but since it is an educational setting, it's different from being a "manager" in some ways. She is an assistant and so will help the other coworker very willingly on anything they ask but appears to delay the few requests I have. (She is an assistant in name although we call us a "team"). I have tried to maintain a friendly work environment for the sake of it, but have let her know when I think she has crossed the line (e.g asking if it's ok to leave work early for a clearly non-acceptable reason)
My question is - do I just suck it up for the remaining few months, or do I call her on it. She has been very adept about having "allies" at work and is very savvy about doing things strategically so she is shown in good light to those above. I think she is doing this because she is frankly "done" and also that she senses she can get away with things because I "need" her around and has a "good reputation."