Just making the point that it is possible Betsy was wrong about what she heard. If I remember right, Frankie's testimony was less adamant than hers on what was said. He's in a position of either backing up his wife or not... Not exactly a corroboration from a disinterested person.
Stephanie's somewhat ambiguous ("I was there, I heard it" stops short of saying exactly what "it" was, although we can infer it pretty well) remarks on recorded phone calls/messages carry less weight than her sworn statements, and her sworn statements appear to be consistent. Not that they don't cast doubt on her sworn statements, but she wasn't under oath and can BS her way out of what she says she meant, claim she meant something different, just gossipping, whatever. The standards of what is conclusive in court are a bit more demanding than the standards of this (and any) web forum.
Seems to me that this is still a he said / she said deal, in the absence of some definitive, independent corroboration, such as from the doctor in question or other wittinesses. If they did identify the doctor (hard to see why they haven't been able to) identify the doctor(s), I would imagine doctor-patient privilege would be invoked, unless waived by Lance.
I'm not saying what did/didn't happen or claim to know what was said, just that it's basically Betsy's (and Frankie) word against Lance and Stephanie's.