I'm a designer and hired a general contractor to install the remodel of my client's bathroom. The contractor started acting very irrational three weeks into the job, suddently demanding immediate payments we hadn't agreed to, accusing me of operating illegally, mishandling the project, etc! I've given him more money to finish the job, which has been delayed by him significantly, yet he keeps demanding more and more money and threatened to walk off the job. He also called my client and threatened the same thing.Today he called my client and threatened to put a lien on his house unless he paid him $1,500 right now! My client is furious with me, and I don't know what to do. Can the contractor put a lien against his house for payments we haven't agreed to, & work he hasn't completed?