My apologies for the ignorance to this relationship, being posted under spanking I assumed it was a phrase I had heard in childhood referring to mentoring. I did discover this very brief description that I thought I would share to clarify things for others as uninformed as me. I could have shared the link but coping seemed as easy.
Taken In Hand relationships are wholehearted sexually-exclusive marriages in which the husband wears the trousers and is firmly in charge (to his wife's delight!)—and he always puts his wife and their relationship first. Putting her and the relationship first is the key to creating a marriage in which the man is in control in a good, healthy and sustainable way.
Taken In Hand is neither all about the man, as in some D/s relationships in which the man has control, nor is it all about the woman, as in some DD relationships—it is for both. Neither spouse is a self-absorbed narcissist.
The wives in Taken In Hand relationships tend not to claim to be submissive (though their husbands may well consider them to be so) but they do strongly prefer not to be the one in charge in their relationship, and they do respect, honour and appreciate their husbands and strive to please them.
The husbands in Taken In Hand relationships tend not to claim to be dominant (though their wives may well consider them to be so) but they do strongly prefer to be the one wearing the trousers in their marriage, and they do enjoy dominating and submitting their wife when necessary to maintain their position—and indeed for the pure fun of it.
Taken In Hand is about using the power of a white-hot sexual connection to create a rock-solid permanent bond between husband and wife. It is intended to be fun and sexy, not a duty or a burden. If you don't find the idea of Taken In Hand exciting or at least strangely attractive, it is not for you. Taken In Hand is not compulsory!
Still sounds beautiful to me and placement seems to indicate some of these TH relationships include discipline.