My elder sister is 20 year older than me, and understandably, she is very much like an aunt to me. My twin sister and I grew up with her two elder daughters, who are 5 and 7 years younger than me, both of whom I am very close to, and I do think of them as my sisters.
My plan was to ask my twin sister to be my MOH, my best friend of many years, to be my bridesman, and my two elder nieces to be my BMs.
However, I worry that I will hurt the feelings of my elder sister, and those of my other nieces (who are 17, 16 and 14), especially since my FI has decided to ask my brother to be his best man, along with his mother's long term partner, since he has no siblings and his father died many years ago.
Do you think I should ask my elder sister and my remaining nieces to be bridesmaids as well? Or to not ask them and hope they will be okay with it?