Now that I think about it.
I mean, she provoked the fuck out of Lilly. Yes, she was defending Ben and Lilly was going crazy, but if she had just shut the fuck up, Lee probably could've defused the situation (if you're defending Ben). Lee's been able to keep the peace (for the most part) between Kenny and Lilly, so at that critical moment, it was probably best for her to stay out of it. She knew Lilly lost her dad, she knew Lilly was the one holding the group together and therefore took all the pressures. If it wasn't for Lilly sniping, everyone would've been executed at the motel by the bandits.
Fuck Carley, God I miss Lilly.