NDA is basically a contract between Trisha and Moses. Basically Moses is in a contract relationship with Trisha. But I'm thinking that Moses broke that NDA just by telling his ex the he had signed an NDA with Trisha but I could be wrong.
"What Is a Non-Disclosure Agreement (NDA)?
A non-disclosure agreement is a legally binding contract that establishes a confidential relationship. The party or parties signing the agreement agree that sensitive information they may obtain will not be made available to any others. An NDA may also be referred to as a confidentiality agreement."
I got this from this website
An NDA or non-disclosure agreement is a binding contract between two or more parties that prevents sensitive information from being shared with others.
www.investopedia.com