Is your mother still living, or has she already passed?
If she is still living and you have been named executor to serve upon her future passing, you could trigger potential negative tax liability on you and your siblings by deeding the property into your names before her passing. While she is still alive, it would be considered a gift and subject to IRS gift tax exclusion regulations. Additionally, heirs would forfeit the step-up in property tax basis if property is gifted prior to your mother's death.
Another question to ask yourself... do you really want to own real estate with your siblings??? As Dave Ramsey says... "Thanksgiving and Christmas dinners will never taste the same" after linking family members' finances.
As others have mentioned, you really need a competent estate planning attorney. This is not a situation to do it by yourself to save a few bucks!