MIL wanted to take DC to a travelling fair close to us.Previous to her offer, DP and I had already decided that we didn't want them to go down there. I explained to her our reasons:(a) we feel its a waste of money, (b) DS is really too old for the rides and more importantly (c) it's an annual event that nearly always ends up with trouble kicking off down there.
I said they were fine to go to the park etc but because its not her way she's decided to go to church and not see them.