Yeah. And I also think AAM is out of line to suggest "I'm particularly concerned about her ability to take direction from me" as a script; more reasonable, I think, would be to own the problem as "I'm particularly concerned about _my_ ability to supervise and direct her in a fair and unbiased manner."

They could both be perfectly lovely people who divorced through no fault of anyone, and it would still be reasonable to not want to be placed in a supervisory role over each other. Any decent HR department should understand that.