Should his sisters be my bridesmaids?

Hey everyone!

So lately I’ve had a bit of an issue with my fiancé. I always assumed that the bride was the one to choose her bridesmaids, and I had decided that I would keep my three sisters and my bestfreind of 12 years as my bridesmaids. When my fiancé found out about this, he was very upset. He mentioned that he wanted his 2 sisters to be included as my bridesmaids. I was obviously not happy about it as I’m not close to his sisters and they also have kids of their own, which will make it harder for them to be there for me. I have no issues with his sisters but I really don’t want them as my bridesmaids. I told my fiancé this and he was furious. He was complaining that his sisters will be left out.. I felt guilty but I still didn’t want them as my bridesmaids. The reason for that is, they’ll only be bridesmaids for the sake of looking like a bridesmaid however they won’t help out or be there for me on my big day. He went behind my back and asked his sisters to be my bridesmaids, which made me feel very hurt. Idk why he’s being so controlling. I felt like he was emotionally manipulating me to include his sisters. He threatened to cancel the wedding because according to him I have become very spoilt. He mentioned that this wedding isn’t just about me. It’s about him and his family as well. I don’t know if I should even proceed to marry him anymore.. I feel like my happiness will always be second, I don’t know how I feel about him prioritising his family above me. And if I don’t do something the way he wants, I get called spoilt and ungrateful. I know it’s very manipulative and yet I fall into the guilt trip so easily. Am I Being too self centred? Or Should I just include his sisters even if I don’t want them as my bridesmaids? What should I do?