I am away for 2 nights in a hotel with my 2 sisters and our families to celebrate my oldest sisters birthday. I am the youngest sister. My older sisters are very close and I often feel a little left out with my sisters. Anyway we had a meal booked for 6.30 in the hotel restaurant last night. My kids wanted to go for a swim so we did that before the meal. My sisters and their families went for a drink in the bar. Anyway at 6.15 my sister texts me to ask were we coming for the meal. We were just getting dressed after the swim so I replied yes, we will be there at 6.30. We arrived at 6.30 and they were already seated and had ordered their food. So it ended up that they were eating their food and were completely finished by the time our food arrived. My kids had to sit and watch their cousins eat and it just made me very uncomfortable. My nephew told my kids that they were late (we were perfectly on time for the booking). If we had known sisters were going early we could have spent less time in the pool. AIBU to be upset about this? I obviously didn't say anything to my sisters as I didn't want to argue on my sisters birthday but it's just another time where my sisters have made me feel bad about myself.