AITA for agreeing to let my daughter use our beach house for her honeymoon without telling my son first?

My husband and I own two homes, we have a beach house a few hours away. My son usually takes his children there over the summer and stays for the summer, and they enjoy their summer vacation there. This year my daughter is getting married at the end of June, she wanted to spend her honeymoon at this beach house. It would be more of convenient vacation money wise. She had asked my husband and I, and we of course agreed. I told my son the next time I spoke to him, and he got upset and said that I know his family goes there every summer. I told him it’d only be for a week, and they could come after or before. He said that is cutting their time short, and that the kids only get two months off for summer vacation. I explained more of the situation, and he said she could honeymoon anywhere and if they couldn’t afford it they should have thought about that before having a big wedding. We got into a small argument because he says that’s their tradition and that we know they do it every single year and how much the kids like it and we’re going to be disappointed. He then said the least we could have done was speak to him before hand since summer is right around the corner and that had been their plan. AITA