Arguing at Christmas time?

So my hubby and I had a disagreement this weekend and I need to know what you all would do. He asks me when I sent our Christmas cards out to a certain sibling of his. I told him I ran out of stamps so I didn't send one to them. I did however manage to send one to his parents. I personally don't see what the big deal is because his family simply doesn't EVER send cards out anyway so I didn't see what the problem was with me not sending one. I told him that I wanted to send them to all the people that send us cards every year first. He asked if I sent cards to my siblings and I told him yes because they always send cards to us. He freaks out and told me he wanted all of his siblings to get one. I then get mad and fill out more cards to send, take them to the P.O. to buy more stamps and off they go. What do you think? Should I send cards to people who I don't think even care if they get one?