AITA for not including my sister's husband in her birthday gift?

My sister (F28) and her husband (M35) are the type of people who don't like to be gift less. Whenever you meet them, there needs to be something in your hands, it could be anything, snacks, fruit, etc. Also, they don't like to go out much for parties and stuff, they like to host everyone at home. There are exceptions but generally, that's how it is.<br><br>It was my sister's birthday, her and her husband's birthday is just 5 days apart so birthday presents have to be double and expensive. I got her a 5 carat diamond necklace and her husband a tag Heuer watch.<br><br>I decided to throw them a surprise party instead of just leaving the gift at their home.<br><br>I rented a private room and invited both their families, her friends, colleagues, etc. I got her 2 flower arrangements, one from her husband and one from her family, decorated the whole place, hired a live band, dj, catered authentic food from a high end restaurant, hired a professional makeup artist, got her dress steamed, etc.<br><br>She had an amazing birthday and she loved the gift.<br><br>Here is the problem now. After the party my bother in law posted on social media about the party and the gift I got my sister and the comment section went crazy. A few of my sister's friends commented that it was unfair she got a 5 carat diamond and her husband just a watch. Few commenters said I was spoiled, entitled and arrogant for showing off my wealth like that and that I am trying to humiliate her husband who could not afford any of that. Some commented that I was making fun of her husband, belittling him and embarrassing him. Now my sister's husband is mad at me for not spending more on his gift to match hers and he said I was making fun of him by not giving him as expensive gift compared to my sister's. He said I was playing with his dignity and humiliating him in front of everyone.<br><br>I told him he should be happy that everyone got to celebrate their birthday and the value of the gifts don't always matter.<br><br>He said I should have matched the gifts because I was the one giving them as a "family" and not the husband/wife or friend.<br><br>He said he wants the money value of the watch and the flower arrangement and he will buy himself something that suits him.<br><br>He also said I made him cry and sucked the joy out of their birthday because he felt humiliated seeing my sister so happy while he didn't get the same joy from his gift. He doesn't want any relationship with me and wants me to delete all birthday posts from social media.<br><br>I talked to my sister about it and she said I should not have embarrassed him like that, she told me to apologize and get him something he likes.