Tsunami

I tried messing around with the generator to see what would happen if I set it to "Shannan dead, Skasaher and Lakche would inherit a land from their father". Unlike the cases at Freege and Jungby, Lakche always either followed her lover or went back to her father's land with Skasaher, and Isaac was left without an heir. Is that supposed to happen, or is it an error?