Okay so it goes like this:
Very dysfunctional family. Never really felt close with my dad's side of the family when I was younger ANYWAY, dad had to leave when I was 12, haven't seen or talked to him since I was 16 (for my own reasons).
Fast forward to now. Thanks to Facebook, I've gotten in touch with some old family members. Of course today is 1 year to the day until my wedding

And I posted as such on Facebook how excited I was. My cousin (dad's sister's daughter, who besides being friendly on Facebook I haven't seen or talked to in years) says in reply "does your cuzzin get an invite??? (We are the normal ones, I promise)"
Small wedding (50-60 people tops!) and FI and I pretty much have it set that this person was not even coming because we're keeping it to super immediate family and super close friends only...
How do I address this without offending her?

"I don't know how it gets better than this. You take my hand and lead me head first -
Fearless"