"...feeling she was letting her work colleagues down"

I also know a lone parent who was working part time while in receipt of UC, she was paid her earnings approximately every four weeks. Her pay day varies depending on weekends and holidays. As a result, she sometimes got paid twice during her UC assessment period and then receives no earnings in the following assessment period. When she receives 'double pay' in an assessment period, her UC stops because her earnings were too high (she was also only entitled to one 'work allowance') and she has to reclaim it. It has put her off working as she felt she was getting more confused with what she was to be paying out to council for her rent and her mental health suffered so she ended up being off sick and then feeling she was letting her work colleagues down, so she gave up work and tells other people it not worth going out to work, her daughter and son in law are now both thinking is it worth it to go out and work?