Think I over-reacted.
I was queing in a shop with Dd (4yrs), the woman in front is talking to the woman behind the cash desk in a big booming voice, one of those voices you can't really ignore.
'...well I'm so fed up of being the one buying the presents and wrapping them but not getting any thanks that I just told the children there is no Santa and it's me that does it all!'
I ahem'd and nodded towards my daughter who was looking up at her with a slightly baffled expression, the silly woman then started going on, 'oh he only doesn't come to our house because I'm a bad Mummy, blah blah blah'. I told her to 'just stop talking'
. I actually felt a bit tearful and am suprised I reacted so rudely. Thankfully the sales assistant was wonderful and told Dd that Father Christmas always goes to her house and she knew he was coming to ours too.
Tell me I wasn't too rude, I'm sure the poor woman wasn't meaning to spoil the magic for a 4 yr old, just a bit careless!