Well...I can see how she would be offended...your ls's may not be your FRIENDS, but they are your sisters (sorors as we call it). So if weddings are for friends and family, then they should be included. My ls's took more for me, did more for me, and helped me through the roughest time of our life. You share unique memories with them, and I will be there for them the rest of my natural life. So it would be out of respect, love, and sisterhood that i would invite them. Even if they got on my nerves(which they do sometimes

).
But not to be one-sided, I think she should have gone to the shower anyways. Sisterhood is more than petty conflict, so she could have overlooked it and gone.
And thats my 22 cents....
Total ArRHOgance #4
WIN 01
Iota Psi
"Covergirl Chapter"