tighten the reins

to start to control something or someone more carefully (often + on ) She has tightened the reins on her younger sons in an effort to curb their wild behaviour before it's too late.

Common Names:

Name	Pronounced	Usage
Estavan	-	Spanish
Josepha	yo-ZE-fah (German)	German (Archaic), English (Rare)
Joram	-	Biblical
Izabella	ee-zah-BEL-lah (Polish)	Hungarian, Polish
Darwin	DAHR-win	English
HÁLfdan	-	Ancient Scandinavian