There's been a mistake!
Karan Reece has no other explanation for this situation. Being assigned to work with her ex-husband, Dr. Charles Steinberg? She really must have offended someone to be forced to spend her days with him. The only good thing she can say is at least this arrangement has an expiration date.
Funny thing, though, is that working together for a shared cause forces them to look at each other differently. She's learning a lot about him and his strengths. And those discoveries are causing her to see him in a new way...a very attractive, can't-wait-to-get-my-hands-on-you way. Seems that life with Charles is a lesson she's willing to study again!