So this summer me my best friend his mom and my mom we are planning on going on Caribbean. But my sister doesn't even want to go but she doesn't want to stay home while we go on a trip. And she even hates my friend. How can i convince her to stay? please help
Dont worry about it. That is between your sister and your mom. She can do whatever she wants as long as your mother is ok with it. You have no authority on what she should and shouldnt do. If she wants to go because she doesnt want to stay, then she can go if mom is ok with it. Besides, cruise ships are huge, she will probably do her own thing you will do your own thing.
Trying to make her stay home while you guys go on a cruise is really selfish.