Never.

I think I helped out with my sister's bff's wedding a ton of years ago.

My bff is getting remarried around NYE (her 1st husband fell off a cliff in the mtns and died like 3 yrs ago, & she's moved on and junk), but she hasn't asked me to be in it. She has 5 sisters as it is and I'm not too sure I'll be able to commit to being there cuz distance and other shit going on.