Who is reasonable for taxes and up keep to a life estate deeded home?

I need to know this answer plaese... Family trying to sale everything out form under us and need to know if we can afford the house.. It depends on the terms of the life tennancy...if she was to pay the tax and maintain the property as long as she exercised the tennancy (generally how they are writen)...then she pretty much has to....if she doesn't want the tennancy anymore, she can give it up to the remainderman, (who presumably then gets all ownership and rights to use) and he would be responsible.