cleave to (one)(redirected from cleave to them)
cleave to (one)
To have sex with one (typically a spouse) only, and no one else. I would never cheat on my husband—after all, I vowed to cleave to him until my dying day.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
cleave to someone
to be sexually faithful, usually to one's husband. (Biblical. As in the traditional marriage ceremony, "And cleave only unto him.") She promised to cleave only to him for the rest of her life.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.