Glammanana said: "Now my DIL expects my son to buy for his parents and she for hers the same with any sibling gifts its "yours & mine""
This ^ is exactly what's going on w/ a lot of young couples today (Ive seen it on Mumsnet, etc.). Chances are, DIL feels it was up to DS to provide a card for his dad/DH, etc.
But then Bathsheba saidL " However, the daughter-in-law was well aware that there was a lovely hand written card from her little boy for her father, and therefore it is reasonable to expect that she would mention this to her husband and suggest he organises something similar for his own dad."
I agree w/ this ^^. But perhaps DIL did remind him and he still didn't do it/didn't think it would matter to DH/was trying to push DIL to take care of it, after all. I think some couples struggle over this, often w/ the wife trying to get the husband to take care of his FOO (family of origin), and the husband trying to shift the responsibility back onto her, where it would have been years ago. Parents/GPs, unfortunately, get caught in the crossfire. This may be what happened to DH, Fairydoll.
Also, I agree w/ 52bright and Maggie that they are not providing a very good example for DGS when it comes to fairness, etc. But nothing you can do about that.
But a PP asked if DH minded. If not, then I would leave it alone. If he did, then I might let DS know his dad was hurt. That's all. No badmouthing DIL or telling DS what he should do. See how he responds and what he does, if anything, in the future. Hopefully, it was just a foolish oversight and he'll do better next time.