I know also that most times, the ladies suffer the big loss in a situation where death happened to the man because the family of the man would take over everything and conditionally give the woman a little if the family decided to be pitiful on the lady

This is such a great example for the proper use of prenuptial agreements. It's possible that our family may not approve of our partner, and with a good prenuptial agreement or will, we can ensure that the person we love will be well cared for after our death.