It wouldn't bother me in the slightest, it isn't as though they have forgotten, he has explained to you why they wont be buying anything.
When my DH was diagnosed with his illness and had to give up work pretty much right away as he had struggled on until he was almost dead on his feet I told " Friends" that we wouldn't bother this year. I lost alot of so called Friends at that time as they were miffed, some of them even said " Well we have already bought your present!!", we are not talking diamonds here btw, just a tin of biccies or something. I thought it was awful that they so obviously only give to receive. I would never do that.
Works both ways though, finding out who the really good people are
Our lovely neighbour turned up at the door, and handed us a brown envelope. I looked puzzled. She gave us both a hug and said " You may or may not need that, but I have been in your situation and I know how it is, for one thing you are both in shock, keep it for now, give it back when you can" and she left quickly.
We looked inside to find £1000!!! I think I had said on another thread that I don't cry, but I did then, I could not believe her kindness, and in case you are all wondering. Yes of course she got it all back, wouldn't take any extra so flowers were the order of the day.
There are some TRULY good People out there, not many I think, but we are blessed with this one 