I don't think it particularly matters who's covering in this situation based on the specific positions. Functionally there's no difference. They just need to communicate, or at the very least have the awareness to understand one should peel off and return to the base. If the ball landed just beyond second base, you don't really need a cut anyway.
Rereading the post, it seems like maybe the ball didn't even go far enough for the CF to get it. In that case, again, they need to know each other and communicate. The girl who's going to get to the ball first should just go get it. I don't know that's something you should even have to practice. The slower player should just know the other girl will get there first and then it's her job to cover. I wouldn't even know how to practice this. It's one of the things I don't recall ever practicing, and I also don't recall ever having any confusion during any games I ever played.
