To recover for a tortious interference with an existing contract, a plaintiff must prove: (1) the existence of a contract subject to interference; (2) a willful and intentional act of interference; (3) that the act was a proximate cause of the plaintiff's damages; and (4) actual damage or loss.
“To show proximate cause, a plaintiff must allege that 'the defendant took an active part in persuading a party to a contract to breach it. It is necessary that there be some act of interference or of persuading a party to breach, for example by offering better terms or other incentives, for tort liability to arise.”
Disclaimer: I didn't conduct original legal research to find the above. I simply googled tortious interference with contract and found it. But read the blurb and decide for yourself which party is most likely to file a law suit......if that's in the picture.