I think you should tell him what you've written down here.... Tell him that you also feel undervalued - it's not good to mock you when you've reached the point that you did, nor is it ok to for him to moan about his fav mug, esp as he is more than capable to get it out of the dishwasher himself. You've one child - not two, and his little foible, although nice to indulge him when you can, is not your responsibility and nor should it be!

And as for your daughter, please set some punishment, she needs to know who is 'boss'. I know it's only a bag of chips, but she still took the mickey. She needs to understand that this isn't ok. If you give her an allowance, at least minus the cost of the chips so you can replace them or send her out to buy some more tonight. I am one of 4 kids, and we would not have dared take food without permission from mum - she went loopy if we did that.

Ahhh.... families. Who'd have em huh?!

Hugs.