Twist/wrap/wind somebody around your little finger
Definition 1 of 1
Pro Tip 1/3Power Dynamics
This phrase often implies that the person being influenced is weaker or less dominant. 
Even the CEO is twisted around her little finger; he approves all her requests.
Pro Tip 2/3Emotional Nuance
The phrase can suggest affection or indulgence, not just manipulation. 
He winds his granddaughter around his little finger, giving her treats.
Pro Tip 3/3Informal Context
It's typically used in casual conversations, not formal situations. 
At the family reunion, she joked about having her husband wrapped around her little finger.