It's good your seeing an attorney. Your step-mom has considerable assets, so don't be surprised if the attorney doesn't recommend an accountant look over the assets. A lot will depend on the divorce laws in your state, but the attorney will know all that. I'd just lay out everything you said here to the attorney. He/she will know what questions to aks. They were married for a long time, so she may be required to provide spousal support, depending on the state law, of course.