All we know is that she was a Slavic Martyr with various members of the family marrying into and out of trouble like a Bohemian soap opera.
At some point her daughter’s uncle divorced his sister’s aunt and married her brother who was secretly married to the regent who had recently died from confusion.
Or something like that. It was a long time ago and does it really matter?
St LUDMILA was eventually strangled and we can’t really blame her.