I have had two babies quite close together, meaning two periods of leave with not much separation. My boss has told me throughout how much I am screwing over the University where I work. I am now going back on a job share (which is really good of him to sort out as it is almost never done in my job). I have been told I have to take my holiday accrued during my maternity before I go back and this is 29 days. I got a very annoyed response to this when I forwarded HR's email explaining this to me. I now feel really bad about taking this. Am I being unreasonable for taking this? I am in an environment where it is considered that you should not take all of your holiday.