Hi, I'm Heather, an attorney for 15 years, and I'll be happy to assist you for informational purposes.
In law, there are many types of easements that a person can have. Some are express easements, which are usually in writing. Other easements are implied, in which case they are not necessarily in writing.
It sounds like she could possibly, depending on the situation, have an easement. This is not to say that you could not fight the existence of an easement. For example, you may have heard of a prescriptive easement. A prescriptive easement is acquired in a similar way as adverse possession. The use must be open, notorious, hostile, and continuous for a specified number of years as required by law in each state.
She could also potentially have an easement by necessity, depending on if this road is the only access to her land, and if without the road, she'd be landlocked.
There are defenses to these easements, and whether or not the easement is there depends on the facts of each case, and usually, to determine if the easement is there, there has to be a lawsuit instigated, by either the person asserting the easement, or the person refusing the easement.