This is what I said to SIL tonight on the phone.I have this arrangement with my friends, everyone has kids and it gets so bloody expensive.
Bil/Sil's income is about 10 times that of ours (no joke) so we can not possibly buy them anything they don't have. I said very nicely, it's getting very expensive, lets just buy for the kids.
Her reply 'Well if you don't want to buy us anything that's fine, but we'd still like to buy for you'