It has taken a long time for something from the root cause of Gibbs' nature to come back and bite him in the proverbial butt, however, I think its long overdue.
I have been surprised that more of this kind of episode in the life and work of Leroy Jethro Gibbs has not arisen in this series; given the line of work, and given its the reason he is there in the first place. Questionable procedures aside, and lets not pretend we don't know this happens...a LOT, there is something bigger going on with this case than Mommy-in-Law-Dearest as an avenging angel.
Vance knows it too, or he would not have played along. B**ch lawyer "Hart" thinks she played Gibbs, but baby, she is the one being played by the biggest and baddest pro in the business. And its she and her South American friends who are the big fish NCIS is after...methinks leastways...Hart of course, being a barracuda! :op