Separation Agreements

My friend has been married for about 15 years. He bought a house together with his wife (although he paid for the house out of his own money in cash by himself) and he has it in both of their names. They have no children together. And they also have a cleaning business together that he put in her name only. They were having problems and decided to separate, she moved out and his wife signed a notarized letter stating that: She will keep the business and all the profits. He would pay off all of the credit cards and debts. She would take all the furniture. She would pay for him to get new furniture. He keeps the house and pays her a lump sum of $20,000.00 dollars. They both lived up to the letter and everything was done. Now that he is talking to her about starting to file the paperwork for a no contest divorce online, she said she is getting a lawyer because she wants more. She also mentioned that the notarized letter is worthless and won't hold up in court. Is that true?

What does it take to legally separate a spouses financial debts from each other in Massachusetts?

We have been married for 5 years. Last year we went to a lawyer’s office to make a separation contract. We signed it March of 2006. However two months later, we came back and began living together again. Are we still legally married? Our attorney said that the separation agreement will expire after six months.

What are the requirements in New Jersey to be separated? Do you have to be out of the house or just out of the room. We are not yet considering divorce, but haven't slept in the same room in over 3 months.

If I want a separation and my husband does not want one, can I still get one?