The Tango sessions were this bad?

[DownOnRodeo]

Originally Posted by Villavic

Stevie capitulated in front of the whole band, and we gleefully layered her vocals into the mix of the album

Sounds like wishful thinking, on both counts. Thanks for the quote.
I note that Mick and his ghost writer do not specify that her voice was added to the Everywhere track per se, or that the attempt to do so became the final product. Yes, it can be implied from the context, but maybe the author deliberately used the obfuscatory phrase "album" here instead of "song/track".

If anyone ever detects the layer on which her vocals were mixed into Everywhere, please point it out to me. Maybe she tried adding that "Wanna be with you" part that she ended up singing in the concerts, but it was ultimately gleefully removed from the album mix at Christine's discretion, after the stormy altercation with Stevie had passed.

I could definitely see Stevie's cameo in Little Lies being something that was added in after the fact, to mollify her and avoid the scenario she raised of the truth of her non-participation being found out.