... Using the true love for her son, she was able to break Raith’s hold over her ...
No (alas).
WoJ is very specific and clear that parent/child love does NOT grant immunity from Whampire powers:
... it’s got to be reciprocated equally or it doesn’t work. While a parent’s love for a child can be something pure and selfless, the child doesn’t return the same kind of love. Children can’t. The nature of the relationship isn’t one of equals exchanging trust and affection, but of the greater protecting the lesser ...
(
https://wordof.jim-butcher.com/index.php/word-of-jim-woj-compilation/woj-on-vampires/)
... I’ve always been in the camp that mortals can’t be Nfected since they have free will, however what if Nemesis gives mortals what they most seek - an immortality of sorts? ... So what if Nfected mortals can’t die? ...
I'm still pretty much "on the fence" about whether mortals can/cannot be Nemfected. On the whole, I tend to think they
can (although I suspect it works differently in mortals than in immortals). The strongest evidence AFAIK is Maeve's testimony at the end of Cold Days:
"And the vampire's crumpet. Lucious little thing, aren't you? And so close to Lady Raith. You and I are going to have a long talk after this, darling. I just know you're going to start to see things my way."
(
Cold Days, Chapter 51; emphasis added by me)
Now, maybe this is just Maeve thinking she can glamour/enchant her way into dominating Justine (overriding Whamp controls? Dunno, maybe SummerLady can, at that; or maybe Maeve's anticipating being Queen soon, which I suspect
would give the needed power-up to do so); or maybe she was simply planning to blackmail Justine by holding Thomas captive.
But I'm inclined to see this quote as a veiled reference-to / threat-of Nemfecting Justine.
We have seen Maeve operating as a Nemfected agent for so long -- more AFAIK than any other agent -- that I think she probably has more insight into how it works than any other we have seen. It was a bit of a villain-gloat moment... but then, Maeve seemed a villain-gloat sort of girl.
... This was clearly done by some organization with a lot of experience in dealing with human affairs - note that Morgan says kid Harry disappeared physically, magically & bureaucratically. I don’t think the Fae would be able to hide Harry without mortal help (I do believe Lea was involved because I’ve also heard the WoJ that she would disguise herself & visit Harry at the orphanage) ...
I think Justin was involved in "disappearing" Harry because Justin was the one who ended up with Harry (even though Morgan was also looking).
I don't know that there was any Fae involvement needed. Lea could easily have worked around Justin's involvement, making sure he was distracted by something else, any time she was interacting with orphan-Harry, etc.
By the same token -- and playing a bit of Devil's Advocate here -- I think the Fae could have done it all, without Justin's help, and later tipped Justin off when they were ready for Harry to take the next step. No, the Fae aren't experts in bureaucratic stuff. But since when have the Fae been unable to bargain mortals into doing their bidding? The fae could have had any number of cops, social workers, and even clerical/officer workers, who would happily have "buried" Harry's case beyond any hope of following a paper-trail, in return for many of the inducements the Fae could offer!