why didn't stevie have lindsay produce any of her solo albums?

[Johnny Stew]

Stevie & Lindsey have been very competitive with each other over the years --especially in the '80s. So for the first half of her solo career, to ask Lindsey to produce an album would have seemed like an admittance that she needed his help (and she certainly didn't). And in more recent times -- as nailatixela pointed out -- if Lindsey's producing Stevie's music, they might as well just make it a Fleetwood Mac album.