Basically my mum is doing me a huge favour by picking my DS up from school. This had always been the arrangement since I feel pregnant with DS and due to the fact that she retired the christmas before he started school. Now she has decided that she still wants to work part time (more than fair) and has two jobs - which she has a wee van for and the other is hairdressing in an old folks home. Now the day that she does her hairdressing she asked to use our car. We agreed because she is doing us a huge favour getting DS but we have quite a powerful car which does use up a lot of fuel and for each day that she has the car she is using up about a quarter of a tank - so in a week its over half a tank of fuel. On the days that she uses the car I go and pick her up in the morning (about 8 miles) and then she drops me at the station at her bit and then goes back to my house to take DS to school (another 8 miles) then goes to the other side of edinburgh and back again (round trip of about 45 miles). Now I would have no objection to paying for the fuel if she was just taking DS to school but her using the car for work is costing us a fortune. My dad uses their car for work so she can't use that which is understandable but I asked if she could come across to ours in the morning in her van which would give both me and DS more time in the morning and would also save on the fuel. She told me that "no because that would mean that she'd have to put fuel in her van and she doesn't want to do that". This hacks me off a bit because surely she would have to put fuel in her own car or the van to get to work if she wasn't taking DS to school and i feel that at the moment she's making 2/3 trips 40 mile trips a week and not having to pay for the fuel because we're paying for it. To be truthful we can't afford to put putting out all that money on fuel each week (working out at over £60 per week) as well as paying for my train fair into work. Now i know you'll all say that she is doing me a favour and I should be grateful and I am grateful that she's helping with DS but I just feel as if a little bit of compromise wouldn't go amiss. Ah!! Am I being unreasonable????