@sean_6202 if youa re using Adobe Acobrat Pro, then yes, there is absolutely a solution within Adobe Acrobat Pro that allows for multiple signatures on a single PDF without locking it down after the first signature. You don't need a "yes/no" prompt, as the functionality is built into the signing process itself, though it might not be immediately obvious if you're primarily using the "Fill & Sign" tool.
The key lies in understanding the difference between a "certified" or "finalized" signature and a standard digital signature field or using the "Fill & Sign" feature correctly for multiple parties. Adobe Acrobat is designed to support workflows where multiple individuals apply digital signatures, and it achieves this by allowing each subsequent signature to be added incrementally without invalidating previous ones, unless explicitly told to finalize the document.