Insurance claim question?

Our rental house in Houston was damaged in Hurricane Ike. We don’t own this house because we are investors; we were simply relocated by my husband’s company and we couldn’t sell the house for what we needed to pay off the mortgage. We have a insurance company known for being generous and taking care of its customers (USAA), so when they wrote up the claim it was no surprise that it was more than expected. They thought the whole roof needed to be replaced and that the work would cost a lot more than it did. Our reliable home improvement guy there told us that the he didn’t think the roof needed to be replaced so we had him do the necessary repairs to the roof and inside the house along with hiring a remediation company to come and dehumidify the house and remove any water damage. It has been 2 1/2 years since we moved out and our renters were moving out in January so we decided to use the rest of the money to upgrade things in the house for a quick sale and use the rest to pay the note while it was on the market. Now we have a potential buyer and they are demanding the insurance claim papers, first of all did we do anything wrong? Second, am I required to hand those papers over? If we are, then we will have to have the roof replaced with the rest of the money and foreclose. We won’t be able to afford any items someone might have on their repair list from their inspection of the property and we won’t be able to pay the note. Please any advice…and don’t bash us we truly didn’t know, until now, that it might not be okay. We were just trying to not foreclose.
Well, duh…that is what we realized it would come across as if we didn’t show it. Hence why I asked the question. You did not answer the two questions I had. Again, duh, I know our house isn’t the only one for sale. If you can say something helpful don’t bother replying.