Final answer:
The phrase 'keep your friends close but your enemies closer' means to be aware and knowledgeable about your enemies' actions and intentions. Shelly could follow her mother's advice by befriending someone who has been trying to harm her or cause trouble, gathering information and potentially preventing negative actions.
Step-by-step explanation:
In the context of the question, the phrase 'keep your friends close but your enemies closer' refers to the idea of being aware and knowledgeable about your enemies' actions and intentions. It suggests that by having a close relationship with your enemies, you can better anticipate their moves and protect yourself.
An example of how Shelly could follow her mother's advice is by befriending someone who has been trying to harm her or cause trouble. By gaining their trust and keeping them close, Shelly can gather information and potentially prevent any negative actions against her.
It's important to note that this phrase is often used metaphorically and not meant to be taken literally. It emphasizes the importance of being vigilant and cautious with those who may pose a threat, rather than suggesting that one should maintain close friendships with actual enemies.