Cleaning lady piano

[bombaysaffires]

Ok so I've been wondering something, and I'm sure some of you smart people can offer some answers.

Who is playing (esp the piano) on the cleaning lady version of Sara?
Here's why I ask:
-Stevie has said she recorded her demo in Dallas at Gordon Perry's studio (this came out in the Sara lawsuit)
-Lori and Sharon (presumably) are doing the extra vocals on this recording. Would she have brought them in to a FM-run session back in those days?? Why, when she could work with Chris and Lindsey?

This makes me think this recording is the one done with Gordon in his studio (and then built on by FM) but then it begs the question that nags me-- who is playing the piano on the cleaning lady version?

Is it Christine's newer track with Stevie's original Dallas vocal?

Is it Sandy Stewart or some other session player in Dallas?

It just makes more sense to me that this is totally not the Macsters but Stevie and the girls and some Dallas musicians and this is the recording she brought to the band. Why record all the instrument tracks and lead vocals with FM and then have S&L backup vocals on it??

But I could be missing something obvious. Anyone know?