I guess not...if you and your husband came to an "understanding" that there were to be NO gifts...why would you agree to this? And then purchase gifts as a way to embarass him?
No, I'm not a lawyer...but I also don't agree to things I have no intention of honoring.
You're driving this over the edge. Give it a rest, it was over 30 years ago....jeez. I forgave him last week over it.