Pulling field from one table to another

I've been trying to for days to figure this out on my own and I can't. I'm newish to writing formulas, and I'm not even sure if what I'm trying to do is best or even right.

I have Table A, Employees. I have Tables B, for tracking probationary meetings. I have the relationship set up that Table A is the parent and Table B is the child. I need to track whether the employee had a meeting and that it happened prior to the due date.

However, I can't have a lookup field from the child go to the parent. I need to bring the date from Table B to Table A so I can set up a report that will color code the record if the meeting was not done on time. I know how to do the color coding part, I just need help with getting the field from Table B to Table A. I've tried the GetFieldValues but I don't know how to point to a different table's field id. Table A emp id field is id 9. Table B related emp id is field id 15 and date is field id 28. 

Help! And thank you in advance!