Traveling Montenegro. Worst Nightmare ever.

Hi all, <br><br>Let me start by saying that I'm a seasoned traveler, been to a lot of places, and I know how to act and behave myself. I'm German but have lived in the States for the last 12 years. I'm not looking for pity or anything, but I just need to express this so I can move on the best way possible. <br><br>So my sister and I made a plan to go to Montenegro, since my husband is not a big traveler I invited my sister to go with me. We planned everything for Jan 5th, but she wanted to go on Jan 2nd instead, because she owns a beauty salon and she said she got a lot of bookings before the holidays. So I had to move the whole trip and I did. <br><br>On Dec 30th, I drove to pick her up on my way to the airport, she said she's still cleaning up the salon and needs to take a quick shower, so it took her a whole two hours just to get ready to meet me, by the time I dropped her off at the airport, She had missed her original flight, so I had to book her a new ticket for the next day. She said she's sad and cried and apologized, and I said I understood that mistakes happen and it was fine. <br><br>On the 31st, we both got to the airport on time. I had paid for our airline tickets (over $2k) plus the hotel where we were supposed to stay (over $2k), because I had to pay her share since she didn't have a job (she said). She said she'd pay me back once she gets her money for the holidays. <br><br>She got to the airport and told me that she'd left her passport at home, I almost fainted. She said she'd go back and get it, so she got on the highway and came back almost an hour or two later with it. <br><br>We still made it to our gate on time and everything went well, until we got to immigration, on our way there we saw a lot of people lined up at the self-service kiosk. We tried but it wouldn't work for her, and I just gave up and said we'd ask one of the guards for help. So we got to the gate and they scanned our boarding passes, we were still waiting and I asked one of the guards for help. They said she'd not been cleared at security and had to go back and explain. <br><br>We went back to security and had been waiting there for over an hour before they finally let us through. We came back and they still said she had to be cleared. I told them we just got cleared at security and they said it wasn't the same. At that time, the flight was boarding and I started to stress out and get anxious, my sister just stood there like a statue and didn't do anything to help at all. One of the guards suggested we speak to the ticket collector instead, so we went there and I paid $350 to get her a "security clearance" in the end it still didn't work. <br><br>By this time, boarding was closed and I missed my flight, I got on the next one which was 6 hours later and called the hotel to let them know we wouldn't be arriving until 10 pm. I didn't tell them what happened because I was still in shock. <br><br>So I called her an Uber and she went home, I went to a nearby restaurant to eat some breakfast and waited for the next flight. Unfortunately, I didn't get to Montenegro until 3 am, the hotel called around 2 am and asked if I was still coming up, and I said yes and apologized for the misunderstanding. So when I got to the hotel it was closed, I waited outside for 2 hours in the freezing cold before a taxi dropped someone off at the hotel, and I asked the security to call someone to let me in. I told them what had happened but they still gave me a weird look. <br><br>The whole trip was ruined, I couldn't get any sleep and I ended up on a different flight the next morning. <br><br>I didn't hear from my sister until I got back home. She called me and said she was sorry that I missed the trip, and that I should have let her know I'd be back home the next day, and she'd pick me up from the airport. I said I'd do it again if I could. She didn't apologize for ruining the trip or anything, and didn't even offer to pay me back. My husband was really angry, but I said we can take it as a loss. <br><br>I just feel so hurt that she just stood there and didn't help or do anything to make it work. I know these things can happen to anyone, but I just have a bad feeling about the whole thing and would love to know if I overreacted or if I should have kicked her off the trip on the spot.