Wrapped around the finger?

LeGion12359I have him wrapped around my finger.Does that mean "I make him to do whatever I want"?

It means that she can do so.

Mister MicawberIt means that she can do so

"She can" means she don't do it but she can. Am I getting it right? If that is so, then why she didn't add 'can' before 'have'?
Moreover, is that a causative passive voice?

LeGion12359"She can" means she don't do it but she can. Am I getting it right?

She may or may not; the sentence does not reveal this.

LeGion12359why she didn't add 'can' before 'have'?

Because 'be wrapped around one's finger' means 'can make do whatever one wants'.

LeGion12359Moreover, is that a causa

Mister MicawberLeGion12359"She can" means she don't do it but she can. Am I getting it right?She may or may not; the sentence does not reveal this.LeGion12359why she didn't add 'can' before 'have'?Because 'be wrapped around one's finger' means 'can make do whatever one wants'.

Thank you, sir.

Mister MicawberLeGion12359Moreover, is that a

LeGion12359is that a causative passive voice?

No. She did not get someone to wrap him round her finger.

LeGion12359These types of idioms are a part of day to day conversation, and I should know them in detail.. What do you think, teacher?

You should know the idioms, certainly, but you should not waste time going into brown studies of their structures.

Mister Micawber You should know the idioms, certainly, but you should not waste time going into brown studies of their structures

I agree. One of the features of idioms is that the meaning is different from the sum of the parts. Analysing the parts is a waste of effort, because it does not allow one to produce new language.