My OH offered to drop off/pick up a neighbour's son at our son's school while her partner was working to make it easier for her as she has another child at a different school but now that her partner's job has ended, they still send the boy down each morning without even checking if its ok with us and sometimes, they don't even bother to turn up at school to pick him up assuming we will.
It's getting my OH down as he cannot do anything with our son after school or buy him sweets cause of the other boy. It's also quite presumptuous and the thing that really gets my goat is that the woman's partner is always in when we're doing the school run - it's like they're only in it for saving petrol and its starting to take the mick!!