Good questions

No i generally don't worry about being outed. I am in a long term relationship that is aware of my relationship with my femdom. so I have consent there. The person i am in a relationship with may feel better with an NDA in my place

The relationship goes far behind normal money for sessions and includes joint bank accounts, credit cards, auto notes etc. we dont use pseudonyms we have real names including addresses etc and have visited each others homes. There is a high level of trust.

While i dont feel comfortable posting specific dollar amounts they are large and will likely get larger. Despite everyones good intentions people do strange things when money is involved. Especially at this dollar amount. Much like we put wills, prenups, trusts, etc in place to protect ourselves in real life relationships An NDA may be one option to continue the relationship but make all parties feel comfortable with some level of protection.