Lot's of good replies here!
I wouldn't have made any fuss about a simple toy sword...
But, I Sooooo agree with the OP, and I do not think that she is overreacting at all!!! My guess is that the toy sword was the tiny straw that broke the camels back. It was not wise to make a big deal out of it with her 4 year old... But, hey, tiny mistake... things happen!
I think that we sometimes forget just how MUCH it means to grandma to be able to buy things to indulge her grandkid(s)!!! I mean, really, to tell Grandma that she simply can not buy any toys????? I used to love to occasionally buy things for my neices and nephews!
But, yes, the the big BUT.... I do know that this is sometimes a VERY serious problem!!! Here is one of my examples... DH asked his parents if they would help buy DS an expensive battery-powered ATV for Christmas.... and they agreed. But, this means that I do not even get to have the experience and joy of seeing my sons face lite up when he sees it under the tree and hops on it on Christmas morning!!!! We let Santa leave it at Grandma and Grandpa's house, and they didn't even bring it inside and put a big bow on it or anything... Just threw a dirty old tarp over it in their garage...
Now, DH has already made the mistake of mentioning a new bike for DS for Christmas this year, to his parents. If Grandma and Grandpa, (who are complete control freaks who have openly opposed my parental authority) think for ONE second that they are going to be the ones to have a big shiny new bike under THEIR tree on Christmas morning, and to basicly rob me and my DS of our experience..... Then they are very seriously mistaken!!!
So, ITA with Aidensmom!!!!
Gifts are one thing... But competitive, controlling, undermining of parental wishes, and over indulgent giving, are just plain WRONG.