and heir to an oil fortune. mark allen: the limo people asked me, do you want some guy, or do you want the ex-mrs. washington? i went, i'll take the ex-mrs. washington. josh mankiewicz: five months after meeting peggy thomas, allen says he asked her to marry him. the biggest mistake i ever made my life. josh mankiewicz: within months of moving to his new mexico ranch, allen says peggy was nosing her way into his horse business, pressing him to fire longtime employees and hire friends of hers. you know, she wanted her people to do the accounting and stuff. josh mankiewicz: when he refused, allen says, the man-magnet turned into a man-eater. she'd get on me, and this is like, a dang-- you know, this is like a man getting on you. she's a pretty good-sized woman. i looked in her eyes and i--