I work part time 9-3 5 days a week. My dh works away and I have no family support near by. All childcare I need to pay for.
But life throws some curve balls, and some things are what happens with kids.
During the summer term, my ds broke his arm at school, and had to be admitted to hospital to have it operated on. Therefore I got a call at lunchtime, had to leave work to go and take him to hospital, resulting in half a day's annual leave, and then a week's annual leave whilst he was in hospital. I've then used other annual leave to help with the school holidays, and had an hour's annual leave left to use for the nativity play (starts 2.30 in the afternoon so would have to leave at 2pm to get to it).
I got a call on Friday lunch time from the school to say that my ds had a suspected broken leg, and could I take him to hospital. My immediate line manager wasn't around so I informed someone else where I was going and went.
Today I asked if I could preferably work the 3 hours I missed on Friday after work today and tomorrow i.e. work 3-5 today and 3-4 tomorrow, or if they wanted me to I would take it as unpaid leave. The response was by allowing me to work the hours that would be preferential treatment, for all the other staff who are full time and don't have children, and as I still had leave I would have to take that and have 2 hours unpaid.
I said that I wanted that hour to go and watch my son's play, and got the response that I'd lost that opportunity, and was not able to watch him.
I understand that work is work, and will regularly stay on for meetings that are beyond 3pm to help other people, and I'm not expecting anything for free, i.e. willing to make up the hours or take it as unpaid.
Prefer of course to make up the hours rather than lose pay, but understand that may not be of choice.
But just feel so sad, that I'm now missing my ds' nativity play. 
Going to sit down and work out the finances, and see how we'll be if I don't work, as I want the memories of my ds' play to look back on when I'm old, not of the hours sat in an office.