Well while wondering how to explain to my aunt differences in belief systems apparently my sister took the initiative. She lives only close to our aunt and suffered from brain freeze at the same time the rest of us did, so while doing errands she dropped into our aunts house and had a heart to heart.
I don't know exactly what was said but early this morning our aunt phoned me to apologize and to ask if I was offended.
She admitted that she had no clue about the difference between different gods and still doesn't, but at least now she knows that they are not all the same christian god.
Now the only things I need to think of this week are finding a new job and Beltane.