well no you shouldnt - you should kick off with chicken pox
however I think what happens is that the chickenpox was just a pock - it can be very mild in children and er she didnt notice
[ My mother was diagnosed with rheumatic heart valve disease at age 85 and commented - "Oh there was a time in India, 1925 when i spent a year in bed (!!) and no one knew what was wrong with me...." which presumably was her under-diagnosed rheumatic fever ]