I have never heard of "alcohol resistance" so not sure how to answer that. What I do know is that my family seems to carry a gene that permits them to consume large quantities of alcohol at a time, myself included. We are all definitely alcoholics, whether they can provide evidence to the contrary or not.
An old friend of mine is able to consume relatively large quantities of alcohol and appear to physically function "better" up to a certain point. I have heard of people who alcohol affects differently than others; drinking it makes them feel "normal."
I should say,
LawOfficer, that people who do not have a problem with alcohol do not sit around wondering whether or not they have a problem with alcohol. Something to think about.
Regarding this:
how can we know when too much has been consumed to avoid damaging her liver?
I believe for heart health, for a woman her size, the guidelines suggest no more than one drink twice per week? Something like that. For more information about women and drinking go here:
NIAAA Publications