Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: Using a throwaway for obvious reasons.

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Little bit background, My wife and I are grad students in US and we hang out and travel in a group of 8. In the trips, one of us (referring him as X) takes the lead, does all the hotel, car, air bookings. He has been here 4 years more than us and is more knowledgeable about rentals and places. He generally puts the amount spent, and we split it 8 ways. We have never asked questions about the amount before.

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This spring break we planned for a Florida trip. X booked a 12 seat van by himself. My wife and I were a bit surprised because of 1) not sharing with group, 2) for booking 12 seat van for 8 people, 3) finding cheaper options even with 2 separate SUVs ($400). We shared in the group the alternatives. We suggested canceling the car reservation and book later together. X then mentioned that he fully paid and booked it, so all is done. Now at this point, my wife got a bit stubborn. Even with $50 cancellation fee, we could have got fair deals here. She also said the website should have a cancel button online. She asked for the car rental company's name and reference. X did not give that, he was changing topics. At this point, he said he is sorry and is paying extra $50 from his pocket. He mentioned this should be the end of discussion here.

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We were struck, since no one asked money, and he does get to say end of discussion. So, after 1-2 nights, all 7 of us except X (he lives a little bit far from us) was having a hangout, and my wife asked X to join. When X came, she politely started the topic again and asked for reference number/ receipt for car rental. X again started to change the topic, walk around, take smoke breaks. But she was persistent after about 1 hour X finally sent the email to her. There was a Cancel button in the email. She clicked on it, and canceled in a minute. X said that it did not let him do it before. We didn't say anything and decided to get 2 separate SUVs. We left.

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Immediately after leaving my wife says she is not going on the trip and showed in the receipt that nothing was paid. Only a $50 was paid for insurance. Also, it was booked for 5 days for 4-day trip. We could not make any reasons out of this, so my wife decided it was better to stay clear or it.

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She mentioned in the group thread, that due to personal reasons, we won't be going. We will cover the lost expenses (Airbnb cancellation fee, air tickets). After we said that, 2 of others in the group also canceled. It got awkward and all 8 of us sat together again. We initially said some personal reasons. After others pushed, we asked for everyone's consent (including X). We then discussed the issue. Everyone saw the receipts. It got weird and X left in the middle without saying anything. He has not given any reasons for the whole thing.

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AITA for ruining a whole group of friends and canceling a trip? Also, what might be the possible motivation behind X's activities?

canceling a group tour, and possibly a hangout group