While Giles thanked the vicar for his time and his recollections, Diana stared at the damning record once more. A record that confirmed not only Giles’s parentage but also his father’s blatant infidelity. Or perhaps even bigamy if the vicar’s assumptions and the register were correct and Gerald Sinclair had purposefully taken the abbreviated spelling of his ancestral name to marry another wife while his duchess still lived.
Dumbass. If he married your stepmother *after* he'd been to Wales and met your mother, there's a very good chance it was his *second* and therefore the bigamous one, no matter what society believed