My little sister is getting married in September, we had an agreed upon date and location for her bachelorette party, that I was hosting for her at my beach house. A week after planning and making arrangements, my sister texted me as well as the bridal party stating that the location which was already a destination location was changed to another destination location. That in it's self was not the issue, the issue was that she chose a date that she Knew I was unable to make, due to a trip I already had planned. Within several hours of her text, she had rented an Air BnB and got the tickets for her bridesmaids. Taking complete control out of my hands, as the MOH. There seems to be no consideration for me, if I would be able to make that weekend or if she expected me to drop everything to make it. As her older sister with a 12 yr age gap, I'm questioning if she even wants me there, and to be frank, I'm upset with the lack of consideration. At this point I don't even want to go even if I could somehow make it work. Any thoughts ?!