Understand the desire to step back for a while. I think all (no exception) of the alternative comments in this thread have come from a point of view that expresses concern that all may not be what it seems. People keep pressing this because there is a chance you may be entering into an arrangement that is not on as sound a footing as you thought.
If I was in your shoes, I would be getting a 2nd legal opinion. Without intruding into your personal details, you could publish the content (without names etc) of your husband's waiver, and the legal eagles that have been gathering over this thread could offer specific opinion that might help put the matter to bed.
Of course, whatever the advice that may follow here, a formal 2nd legal opinion may be advised, considering the health warning that rightly goes with using any information you read on this forum.