Baby Becky, I'd say the opposite, that Howard and Beth are going to leave each other and they will do so on very bad terms. She might have to sign a non-revelation agreement like you give to servants who are in your employ and later leave.

Howard has put off this dream of Beth's for eight years as she's smilingly hung around like an obedient puppy waiting for a bone.

She has absolutely no dignity but, Howard doesn't afford people dignity. He's a self-absorbed bastard that has a funny show. That's how you get to be successful. Others around you pay the price as did Alison and his parents. They were all grist for his "funny" mill.

Beth will keep her true nature to herself awaiting this big treat but, should it ever come to pass, she will make sure he suffers for all the waiting, torment and uncertainty he put her through as at this point, she knows there's no love; she now wants that money.
Women don't forget stuff like that.