It may be career limiting, but not career suicide in the States. There are a number of models who have gone years without doing anal. If she's reliable, gives good performances and remains in demand, Keisha can have an active career (I won't say "good" because I'm not sure how to quantify a good porn career) for a few years, which is longer than most models stay in the biz.
That said, I can't count the number of models who said they'd never do anal who end up doing anal. Kennedy Leigh did anal at letstryanal and tweeted that she'd never do it again, but just recently, she was tweeting Jules Jordan about anal training, so who knows.