Concept:The idiom "live in each other's pockets" refers to people who are almost always together.
Explanation:This phrase means spending a very large amount of time together, often to the point of being inseparable.
It has nothing to do with money, sharing wealth, or borrowing from each other.
Option A, "to have a lot of money that is shared with others," is about finances and not closeness.
Option B, "to exchange wealth readily with each other," also describes financial transactions.
Option C, "to live by borrowing from each other," suggests financial dependence.
Only Option D, "to spend too much time together," correctly captures the meaning of the idiom.
Answer:D. To spend too much time together