No, I did not do a prenup when I remarried. My Mom wanted me to. I told her why marry if you think the person is going to screw you over?
We did a Living Trust. If I die before my husband, all assets are his until he dies, then any remaining assets would be divided between his daughter and my 3 children.
We aren't rich, but we have a nice home and live comfortably. If in the end there is nothing left, I really am fine with that. Neither of us feel that our duty is to insure that our children win the death lottery. If they end up with some money it means we ran out of time to spend it and they are welcome to it.
We gave our children great foundations to build their own lives and financial well being from. We got to where we are by our own hard and dedicated work. We feel our adult children are capable of doing that also.
The only way this marriage will end is when one of us dies. Something about being in your mid 50's when you remarry and knowing what you want and what it takes to have a loving and successful marriage.
I personally will not marry again. It wouldn't be fair to the next man to be constantly compared to "heaven on earth."