Websites/blogs where our wedding has been featured:
I know I am a little late to this party, but I say def invite her. It puts it all on her to come, rather than in 5 years having her say that she was not invited to your wedding.
Up until the day before our wedding, my FIL was planning on working an auction rather than coming, because it "isn't a marriage!". In the end, he shut his mouth and showed up, in jeans and a ball cap, but that is a different story.
To me, I could not have cared less if he was there, but my wife certainly did. She may surprise you, hopefully she sees that she needs to be there for you, regardless of the wording.