My mom left me a life insurance policy just for me and my 2 brothers and sister want me to use this money to pay for the funeral so that they get more money when the estate sells.
I am the only beneficiary on this one policy and my mother told me she wanted me to have it. She did not list it in her will for me to use it for her burial. Is it fair that I pay for the whole funeral?
No, it is not fair that they try to make you use this money to pay for your mother's funeral.
You can use the money from the life insurance policy as you wish. You are not required to sue it to pay for the funeral.
You may suggest to your siblings that you all pay equal shares for the funeral and burial costs.