There's a deleted scene from one of the season 3 episodes has an exchange between Daisy and Mr. Mason:
Daisy: This’ll be hard for you. . . but . . . what would you say if I’d met a man I liked. Because the last thing I’d ever do would be to hurt you.
Mr. Mason: What? D’you think I’d want you to be alone your whole life long?
Mr. Mason: Well, William wouldn’t want it neither. Oh. This is too modern for me, Daisy. I’d only say this. You have a pure heart and if he’s a proper man, he’ll know that. But take your time. Prepare what you’ll say. Make sure your words cannot be misconstrued.”
Why did Mr. Mason emphasize "pure heart" instead of just pure in general? Is this an indication that perhaps Daisy and William consummated their marriage and that she's no longer a virgin?