Thanks for this link! And it confirms that indeed, Kate didn’t use a foot double for that shot, like we thought. (Some sharp eyes on here insisted that they were Kate’s).
The part where they talk about feeling sorry for the gal who has to suck Kate’s toes through many takes (!) reminds me a lot of the interview with Joan Chen about the toe sucking scene with Maggie Han in “The Last Emperor” some years ago. Joan felt bad for Maggie and made sure that her feet were completely clean and sterilized. Also many takes.
Edit: Found an excerpt from the Joan Chen interview where she talks about the toe sucking scene. Below..
Q: Did you think of The Last Empress as a sexy role?
A: She's a sensuous role, yeah, but she didn't have a lot of really sexy things to do.
Q: Well, with Maggie Han...
A: Yeah, she's a very sensuous person.
Q: Was that particular scene difficult for you?
A: No, it wasn't difficult. [Bursting out laughing.] It was probably difficult for Maggie because she had to kiss my foot.
Q: Actually, she had to lick your toes.
A: [Still laughing] I washed it with soap, rubbed it with rubbing alcohol in front of Maggie to show that it's clean. No, it was hard for
her, not hard for me at all. No.