Without going into too much detail...I have a sister who travels extensively and goes on at least 5 foreign holidays a year. She has in recent years come to rely on me to drive her (sometimes on her own, sometimes with a travelling companion) to the local airport (10 miles or less) and pick her up. She doesn't offer petrol money but does pay for the drop-off/pick-up parking charge (around £6 a time). She's now told me she has booked a holiday in September (with her partner) flying from Edinburgh Airport. she has asked me to drive them from Glasgow to Edinburgh Airport and pick them up (10 days later) I haven't been given flight times but she says they are "good". Because of the recent pattern I am sort of expected to accede. This will involve about minimum 4 hours of my time (1 hour journey X 4) and 180 miles (4 X 45 hours). I know she wont offer to pay the petrol, There's also the issue of my unfamiliarity of edinburgh airport and where to wait before getting the text that they are at the pick-up point. My sister is a very strong character and I am weak, have no family except her and her daughter and no close friends. I don't want to fallout or have a confrontation. What would others expect if this request was to be made? I have checked that a taxi would be a minimum of £98 each way. Am I being mean or unreasonable to refuse or to request petrol money? Just got that unpleasant feeling of being used.