I am contracted to work 16 hours a week over 3 days but due to workload I often work at least an extra hour a day. I don't want to do this as it interferes with family life. However, as I don't work many hours, I feel bad complaining about this and also find it hard to finish on time as there is so much work. It's not that I'm asked to do extra; more that I feel duty-bound due to the nature of the work and there is too much to do. WIBU to stop doing this unpaid extra work and letting work pile up or is it just expected in most roles, even ones like mine that are not particularly well paid (despite having a fair amount of responsibility)? Part of me thinks I've been a mug but the other part feels guilty for only working part-time, despite having a demanding home life.