Cool, another hoosier! I live just north of Lafayette....I'm sure you've heard the lovely jingle "there's more than corn in Indiana....at Indiana Beach..." I'm about 7 miles from that monstrosity.
Absolutely she should pay you something, even if it is only pasture board. I'd think hard on what your boundaries & bottom line are and go from there. Whatever you do, type it up, sign it & do it in front of a notary. We've only had 2 boarders in almost 50 yrs of the farms existence and I can say without a doubt, I will never have another!
Life is like a camera. Focus on what's important, Capture the good times, Develop from the negatives and if things don't work out, Take another shot.