I love that scenario!!! though, why wouldn't Dan disclose his own evidence to his lawyer?
I think what might work to fill that plot hole, is there might be some knowledge or evidence that *Sarah* explicitly has that would exonerate Dan and implicate Lester.
But, I love the premise of her lying to protect Lester over Dan, even when it comes out that Lester orchestrated everything from Dan losing his job to Sarah losing her promotion and, ultimately, her job to who knows what else.
With this scenario, if I think with my heart, it'd be awesome for Sarah to tell the truth and exonerate Dan.
But, my perverse self - yes! I totally admit, I have a very perverse side - would love to see her lie to protect Lester. Then watch it all crumble down around her.
The compromise between my angel and demon would be, same scenario but flipped. She withholds evidence to protect Dan and Lester gets what's coming to him. And Sarah totally embraces her slutty self - i.e. she's no longer using the "I'm doing this for Dan" excuse, she's already broken down her barriers, plenty of guys with big cocks for her, what does she need Lester for? And of course, it ends with her being pregnant. Though not before Sarah has a gangbang behind Dan's back, with Dan later finding out, which would definitely end the "for Dan" excuse - if the two of them ever have a real f*cking conversation! - but I digress.
(I really want to see Sarah have a gangbang, not like a prearranged gangbang, but something that gets out of hand, with Sarah just going with it - like she did with Vernon with Lester realizing that he might have unleashed a true succubus - still digressing)