AITA for canceling my brother's wedding venue reservation without telling my brother?

My brother (31) is getting married in July and he and his fiancé (32) visited several wedding venues a week ago to get quotes. They had a list I made for them of the maximum price they were willing to pay for each type of expense. <br><br>They ended up visiting three venues but after the third visit, I found out that they had really connected with the owner of the third venue, his staff, and how customizable the venue was with their packages. The packages started at $3000. <br><br>However, after he left, I talked to the owner and explained my brother's maximum budget for a wedding (which is $8000). The owner was very pushy and tried to raise the price of the package to well over $6000. I tried explaining that was still over my brother's budget and the owner offered one last "sugar offering" of $4500 which is what I offered to pay. The owner was satisfied with that price and agreed to it. The signing document also included that there would be no Applicable price increases between now and July. <br><br>I took the contract to my brother and his fiancé to get their take on it. They were shocked at how beautiful and affordable the venue was. They were very excited when they both realized that I had already arranged for the most expensive package to be paid for and that the owner would not be increasing prices between now and July. They were thrilled and were almost in tears.<br><br>Now, I know that some of you are going to think that this is very controlling. I also pay for my brother's and his fiancé's wedding clothing (her dress, his tux, her jewelry). I'm transporting and housing the out-of-town guests. I'm paying for half of the catering. I'm very close with my brother and I really want him to do well. His job is quite unstable and finances are tight for him right now. I've helped plan most of his events in the past because I find it fun to do and I want him to enjoy his special day. I'm also the type of person to do these kind of gestures for people I love. My brother also feels the same way about me. I know this may be weird to some people but I really don't care. It's my choice on how I choose to spend my money. <br><br>The only thing my brother is paying for is the flowers, the wedding cake, and the entertainment. So, he was thrilled with the news and he gave the okay to finalize the booking. However, his fiancé asked me not to tell him that I had arranged for the most expensive package and that I was paying the sugar offerring price. She said she wanted the happiness of this venue to be real in his face and that she didn't want him to feel like he was on an economical horse ride through wedding planning. I agreed.<br><br>However, now my brother is paying a lot less for the venue, I'm paying a lot more, and his fiancé knows. So, basically, I'm paying almost $2000 more than what my brother is paying for the venue and my brother is paying for a whole lot of nothing. I don't care because I want my brother to have a beautiful wedding and I'm fine with the financial arrangement. However, I'm starting to think I might have been an asshole for arranging for the venue to be paid for without telling my brother. AITA?