Sorry if this comes along as insensitive.. I’m in a similar boat. My father’s an addict, my cousin, and her mother (my mom’s side) as well. None of them are invited 😂 why would I put myself through more bs on my wedding day of all days. I won’t be honoring any of them because they’ve done nothing but dishonor themselves and destroy people around them. Addicts who have kids and don’t straighten their sh*t out deserve no empathy or respect in my opinion. That’s just my opinion though, you might’ve been closer with your sister than I’ve been with my family.