Welcome! My goal is to do my very best to understand your situation and to provide a full and complete answer for you.
Good afternoon. You have no liability for this. You don't need a lawyer for this at this point. Rather, you should send attorney and the homeowner a letter by certified mail detailing the history, informing them: i) you supplied an estimate; ii) the homeowner instead contracted directly with a subcontractor; iii) the homeowner later came to you pleading you to complete the job; and iv) you refused. Inform them further you have been informed by an attorney you have no liability for this and that they need to immediately cease and desist
from contacting you further on this issue. Finally, let them know that otherwise, you will engage counsel to file your own suit against the homeowner and to file a formal ethics complaint against the lawyer with the state bar association. That should be sufficient to put this to bed, but if not, at that point engage an attorney and go after them.
Thank you so much for allowing me to help you with your questions. I have done my best to provide information which will be helpful to you. If I have not fully addressed your questions or if you have any follow up questions, or if I have misinterpreted your questions in any way, please do not rate me yet, but simply ask a follow up question without rating so I can provide you with a fully satisfactory answer. If I have fully answered your question(s) to your satisfaction, I would appreciate you rating my service with 3, 4, or 5 faces/stars so I can receive credit for helping you today. I thank you in advance for taking the time to provide me a positive rating!