Yes, but also not leveling with Harry up front from the beginning of her husband's friendship with him,  of her own background.  Instead she treated Harry as if he were a corrupting influence on her children.  I think it was out of ignorance, fear, and misplaced thinking that magical talent is somehow evil in of itself that guided her.  As forbidden fruit,  Harry's talent and exploits became even more attractive to Molly, for many of the wrong reasons..

I think you're more or less correct, but you seem to be judging Charity's all-too-human failings quite harshly.

"Thou shalt not suffer a witch to live."
As Harry notes, modern scholarship puts gives us a *MUCH* more nuanced understanding of this verse.
But from what we understand of Charity's upbringing... that's probably how she felt about the matter.

Her background with magic was something she was ashamed of.  She never really took any time to really think about it, come to a deeper understanding.  She felt a reflexive dread, and shied away from addressing the issue, doing the emotional work that her own background would have required, if she were to address the issue rationally.

And, just as a practical matter:  as Charity noted, most of Michael's serious injuries came from the few occasions he worked with Harry.  How could she see Harry (and "wizardly" pursuits) in anything other than a horrible light?

... That contradicts what Jim said before, about the potential for life.

Also:  can you provide a cite?
Not that I doubt you, but I'd like to go read it for more context, other clues, etc.

... however I still think a lot, I mean A LOT, of this could have been avoided if Charity faced up to what she was, and that that power could be passed on ...

Oh, absolutely!
But, y'know... all part of being human.  We all have weaknesses, blind spots; truths we cannot face.

And Mab retains  j-u-s-t  enough humanity to recognize (at least most of) those, and know how best to exploit them.

... If I remember correctly, Justine started to be herself again in White Night, when she lead Harry and Carlos to the Raith Deeps. This would also have been the time when she and Thomas started being together again...

If I recall correctly:
 - That was the first time we saw her "being herself again" onscreen, but her self-report was that it had been happening for a while (and she displayed lots of broad awareness of the larger situation, just as if she had largely been compos mentis for a good long time)
 - She wasn't yet being with Thomas, but said she expected she'd be able "to go back to her lord" soon.

If they were truly in love, then they wanted to be faithful to each other ...

I think the more's of the Whampires -- even whampires in love -- are very different around the issue of being "faithful."  It's literally a matter of eating, of survival.

... And though it wouldn't be very difficult to arrange, it would still be a pain to have to find a third every time they wanted to have sex ...

I'm pretty sure it'd be *incredibly* easy for them to set up.
The White Court is chock-full of willing -- in fact, eager! -- mortal partners.  $$$ is not an object for them, either.  Set up a an apartment next door with 3-4 clued-in models, and most of the time at least one of them is literally just 30 seconds away.

... They probably did know that this was a solution but didn't want to resort to it.

That seems unlikely, tbh.  OTOH, I don't have a "likely" seeming alternative to offer.

...
I don't remember the random jogger ...

Very early-on in... I don't actually remember which story.  It's while Thomas is living with Harry.

But:  Harry comes home grouchy, and a cute girl comes out of the shower.  Harry says something biting, the girl snaps back... then concludes that Harry is just Thomas' (gay) lover, being jealous.  She calls Thomas "very naughty" or somesuch.

It's been a bit on this thread, but it might be relevant to note that Rome technically survived in the eastern empire for another thousand years...

They claimed the Roman mantle; so did Germany, later, with the "Holy Roman Empire."
But I think Jim when Jim said "the fall of Rome" he did mean "the fall of Rome," and wasn't weaseling anything.

This leaves plenty of ambiguity, of either the "I'm not telllling you!" sort of intentionally hiding surprises, or "meh, it's ancient history I never saw the need to pin down" sort (or some of each).

I know Mab likes to lay that as a guilt trip on Harry, and he is willing to let himself be guilted.  However I think Molly's situation had more to do with Charity willingly blinding herself to her daughter's awakening talent ...

I'm pretty sure Mab tasked Lea (whose schtick is abusively "inspiring" the talented) with making sure Molly went down the Left-Hand path.

We can be absolutely certain that Mab knew of Michael & Harry's close friendship, and would therefore educate herself about Michael's family; realized one or more of the early-born Carpenter kids would have a decent shot at being gifted.  Mab may have had ways to make that more-likely, or even certain.

Whatever:  she wanted levers upon Harry, and she got them.  Levers of obligation, of guilt, of covert desire (and thus more guilt).