im going to agree with america here, people lie about being sick to get out of things all the time. if it is a long time and trusted employee thats one thing, or if she hadnt called in sick a lot before it should be ok, which it is over here usually. my guess is they were really busy to have her come in, that is the most likely, next which is less likely cause she probly would hace mentioned it is that she has called in a lot recently, third her boss may just be a dick