Can children protest the name on deed of fathers estate – left no will?

Can children protest the name on deed of fathers estate – left no will?

My father died 25 years ago, having two properties with my mom & his name on the deeds. My father was the sole bread winner, and my mother never worked outside the home. He did not leave a Will. Recently, my mom went to a lawyer to draw up a living will, and is going to have my fathers name taken off the deed. Additionally, having my oldest sister be the executor of these properties and named as the sole person to decide what to do with the property as she sees fit after her death. There are 6 other siblings who don’t agree with this. Isn’t there something the 6 other children can do to protest the name change & somehow get these properties to be distributed amongst them?