If your business fails, you (and your family) are treated in much the same way as other creditors in respect of monies that they have lent to the business.
For example:
If you are employed by the business, you will rank as a preferential creditor for salary owed to you (within the legal limits)
If you have made an unsecured loan to the business, this will rank with the other unsecured creditors.
If you own shares in the business, you will not be entitled to a return until all the creditors have been paid off together with interest.
Of course, if you are trading as a sole trader, or in partnership, or have personally guaranteed your company’s debts, these claims may have to be met from your own assets.