Welcome to PC Ble68. You titled this 'twin sister doesn't want anything to do with me' but I wonder if it only feels that way because her husband is restricting her time with you and your family. It may have more to do with him and less to do with her. That said, you are grieving your loss and your twin is very much in the middle here ... very painful for both of you. I hope you seek some counseling to work through this.

Meanwhile, you may have to make do with shopping with your sister and her husband tagging along if you want to see her. Not ideal but it is what it is and a little acceptance will bring you some peace.