Diva in bigamy shock.
Katherine, 32, discovered her great-great-grandfather had THREE women on the go.
Welsh romeo Evan Walters was married to Katherine's great-great grandmother Martha while he was wed to another women. At the same time he had a secret lover and children living nearby.
Walters spent two years in jail after being convicted of bigamy.
Shocked Katherine said: "Oh my gosh, that is so scandalous."
She discovered the crime while taking part in the BBC Wales TV series Coming Home which traces the past of celebrities.