I think I know what it was, JMO of course. My ears pricked up when I heard that she told him they needed to be apart because they couldn't keep their hands off each other sexually, blah, blah, it was better spiritually, blah, blah, and then this easy-to-overlook tidbit:
"...and I won't be going to any PPL conventions..."
and Travis fails to save his life by saying yes, she should, that she's still welcome there because they will always be friends. I think she deduced his real intent to have her completely out of ALL his circles --and that he would be trashing her to make sure he still looked like the good guy, the up and coming guy, the financially successful guy.
We know this was bait because she had already lined up a guy who was much more successful and higher up in PPL than Travis - she had Ryan Burns hooked by the p****s, just like she hooked him. OF COURSE she was planning to be at every posh and exciting PPL event!
So why would she tell that particular lie?