When my brother got married a number of years ago, my sister-in-law did not ask me or any of my sisters to be in the wedding party. He has four sisters. All of her bridal party consisted of her friends and cousins. Of course she has the right to decide who is in her bridal party, my sisters and I felt slighted that she did not ask us or at least say something. She also did not invite us to the bachelorette party nor my mom to go dress shopping.
She was a bridesmaid in my sister's wedding when she got married and my sister got married before my she and my brother I have already asked my brother if he will be groomsman. He said he will. I did not ask her or him for that matter about her being a bridesmaid because I really don't want her to be. Is this really proper improper etiquette-wise? I will of course invite her to the wedding but I don't want her to be in the wedding party.
Also she has done done shady stuff in the past when it comes to my family that I won't get into but that's also an underlying issue too.