Tina...
Things in life are anything but permanent.
If she has stopped her seeing Terrell, at least for now, don't be too surprised if she hooks-up with him again. Feelings like that tend to not stay in control once they are intimate and powerful.
If the Terrell break-up IS permanent (good), you will have to be far, far more involved in managing her FB's..., that is, if you actually step up to the plate and DO IT.
If that happens, you'll have to 'manage' her liaisons much more actively, overseeing her choices for FB's or actually recruiting them for her, after all, now you have her liking big cock, don't expect her to stop loving it any time soon.
The best you can do is supervise her hook-ups more closely, and rein-her-in when she strays too far. She'll appreciate the discipline, and, ironically she will feel more free. It allows her to cut-loose even better, because she will know these occasions are arranged or approved by you, so within that time frame/encounter you encourage her to give it her very best (and she will surely have plenty of large cock).