Hi everyone! 
I've been working as an au pair for this really great family in London for 8 months now. However, I recently I've been feeling they have been "abusing" my time and willingness more and more. By that I mean that I used to work one little hour in the morning, dropping the child off at school. Then I would pick her up at around 3pm, sometimes along with another child that I also babysit for a different family, who would arrive some time between 4pm and 6pm most days. My host parents would be home around 7pm, which is the part of our deal that they would, and occasionally I would have to babysit until later. It has always been like that, but this is where it gets tricky.
I've never really complained whenever they said that they would come home late, even if I would just get the text as late as at 6pm. It used to be 1-2 nights a week, and I would just like to clarify that we never agreed on that I should be babysitting at nights before I got hired. Now, it has gotten to the point where I have to babysit 3-4 nights a week instead and it has really started to get under my skin. One of the things that bothers me the most is that it is not always work related. Sometimes the parents go out for dinner by themselves, out for a movie, going to gym, or seeing friends. Of course I understand that they should able to do that once in a while, but I would just like them to take my work hours into consideration. I know that I can do whatever I want when I have put the child to bed at around 8-9pm, but I'm still on duty. A few days ago, the father was in another country and the mother had to go to an event, so she can home very late. The child was coughing a lot that night, so I had to get up at 1am, because I was the only one home to take care of her.
What do I do exactly? I would like to confront them without sounding lazy or anything, but what is the best way to do it? I just don't think they are being completely fair and it has really started getting on my nerves, but on the other side, I'm not sure if they are noticing my distress.
Also, another thing I would like to talk with them about: school holidays. This year I have had 5 weeks unpaid holidays so far, which is of course nice, but I also have to work full time some weeks, because the parents have to work, which I understand completely. However, my salary is exactly the same, even if I work from 8am to 7-8pm - and again, sometimes they come home late. I don't expect extra money for working overtime usually and they give me the same amount of money even if I have worked less than usual that week - so that sort of balances it out. But 12 hours a day, 5 days a week, shouldn't I get paid a little more than usual?
I would just like to point out that I think they are a lovely family and I have been lucky, but this is starting to get too much. Sorry for my rant.