Under the laws of all states, the issue of who inherits between two people who pass away on the same day where they give each other all thier assets is determined by the fact that the person who outlives the other is the survivor between the two.In your situation, I would simply write out your holographic Will as though you want to assets you have upon death to go to those that survive you including your husband if you choose to give him anything. I suggest that you consult with a Wills and trust attorney as to having a formal typed up Will created as opposed to a holographic Will to prevent possible problems down the road.