DS has a very good friend from school, (they're both 6) and he quite often comes round after school for a play and tea. I know his mum from chatting in the playground, we're not 'friends' but can pass the time of day etc. Friend was here two days last week which I have no problem with, DS and him get on really well and he's a nice boy but I feel a bit put upon this week.
He was here on Monday by prior arrangement, his mum asked me yesterday morning could I have him last night too as she had an 'emergency situation'. Of course I said I could have him. Now this afternoon at school both boys come out together and this little boy says 'I'm coming with you today' - teacher always comes out to make sure children are going home with who they should and said the his mum had phoned to say that I was picking him up after school today.
The boys were excited about playing together again but I wasn't prepared to take him home without speaking to his mum so I rang her on her moble and she said 'didn't you get my message, I had to come and get my hair cut and I knew you wouldn't mind having him again, thanks. And rung off.
Now i have this very lovely boy again til god knows when and I want tell his mum not to do this again without sounding horrible, purely because I am happy to have him round when it suits but I don't want her just to assume that I'll be her free childcare. I know someone will tell me to just grow a pair which I probably should but I'm a wuss. Any suggestions as to what I could say?