I'm still close with some members of my ex's family, particularly his sister and SIL. His sister is still my hair stylist and his SIL my tatttoo artist, as well as my friends. I know it's a no-no to have his sister stand up, but she is invited and is doing my hair. But, I've considered having his SIL stand up in the wedding if need be (this is contingent on whether or not one of FI's out of state friends can make it). FI is fine with all of the above.
Thoughts?