Workflow tracking of multiple documents.

[csiwa28]

I have one form with a event field, description field, a date field, and a button that says mark complete. The user starts off with two documents created from that form and the event, description and date fields contain values that are different on each of the 2 documents. Well, how the process works is that when the user has completed the event, they will click on the mark complete button and a new document will be generated with different values in the event, description, and date field. My problem is that the two original docs have to be completed before a new task can be generated. Is there a way to make sure that the first two documents have been completed (by clicking on the button) before anything else can be done?