First time poster here, so I have some catching up to do in the fan speculation stuff here. Harry's mom is composed of about 90% hearsay and rumors. Let's add some more by speculating wildly here.

Who is LeFay's mom? I'd be disappointed if it was some yet unnamed vanilla human. My money is on the Leanansidhe. Who can we add to the suspect list?

LeFay was also about a century old before she died. Do Harry and Thomas have any older siblings?

Now a hypothesis: LeFay met Malcolm after hiring him for Thomas's birthday on Valentines day. Nine months later, Harry was born on Halloween. Plausible?

What other head cannon have you been filling Margaret Gwendolyn McCoy LeFay's backstory with?

He still has the skull, but having Bob run the castle saves Harry lots of time. Bob can figure out how the house works and let Harry know of things that need his attention. This is especially important because Harry is deep in his post Battle Ground funk.

My personal theory is that since we now know hhwb wasn't sent by Justin, he was sent for him.

Which meant that Justin (who had hijacked Maggie's Starborn plan for his own ends) needed Harry and Elaine ready early, which meant abandoning traditional brainwashing/conditioning in favour of Magical alternatives.

Unfortunately for him, hhwb was able to turn Justin's anti-outsider wmd against him.

Leah explained it perfectly imo, it's hard to get young wizards to believe in doing magical violence. Both dumorne and behind were more interested in manipulating Harry's choices than actually enthrallment or murder. Behind is shown heavily in book goading Harry(same as Cat Sith later 👀 ) but dumorne? Look at his scenes teaching magic, what he actually taught them. He could have indoctrinated them with their own power, made them believe it worked any which way he desired and connected them to him in a proper cult fashion. None of which he did. What he did was teach it to him pure, almost the same as Eb(I'd bet Eb would have been a harder teacher before failing Margaret), as power and strength, as an art unto itself.
Then he was goaded into two different(?) Battles to the death winning both by... Well, doing Death to the opponent. Seems to me they manipulated him into doing exactly as he did 🤷‍♂️ it's only factoring in Justin's intentions for Elaine that things get muddied.

Which means if she hasn't, her free will has been violated, doesn't it?  Though she could very well have agreed to it to stay in the fight.

The healing process might have been quicker.