So there actually is a chance my mysterious heir is the result of a night of fun with a local slavegirl, as henoch said? A bastard? I might have to send a few guys in dark cloaks to insure he doesn't take the throne...

Even so, given the age difference, it would have happened when my king was 10 or 11. What is the lower limit of producing heirs? I rather expected the princes to come of age before beeing able to get kids themselves...