The outfits look similar but the backgrounds look different so, if you guys did it in the same session, maybe it was in a different room. That being said, Mrs. Skirtpie is pretty enough that I wouldn't debate her. Rather, I think you should ask her to do a few more scenes as your work and, especially your beautiful model and her wardrobe, have always been very appreciated!
The first one appears to be a photo of the lady, the othert two appear to be photos take of the screen of either a camera or a monitor, hence the different look. So it could well be the same session.
First picture taken in bedroom. Other two taken from pictures of video playing on tv because I'm a low tech imbecile. Similar to attached. Still not convinced, think skirt/blouse is different.