Tortious Interference with Contractual Relations - Kahan Se Aata Hai?

Maine 3 saal se ye hi padh raha hun, lekin yeh concept mere liye thoda confusion hai. Textbooks khatam kar denge, par AILET me kaise samajhne ki koshish kar rahe ho. Koi to hai jo yeh explain kar sakta hai ki kya kisi ne doosre ka contract badalne ki koshish kiya, to woh tortious interference ka case hai. Par kaise yeh differentiate hota hai ki kya woh mere contract se related hai ya mere friend ka contract se related hai. Kisi to kya jankari hai ki yeh concept kabhi real life me aaya hai, yeh real example dijiye.

Please help, mein to pata hi nahin.