I have a weird situation with a spellcaster-werewolf hybrid too. First off, I have used NO mods, or cheats for this situation. I don't actually have any mods, not even that MCC command center thing and have never downloaded CC content save households and lots from the gallery.
So, I started out this family with one mom, who had a bunch of babies with aliens, if there was a different color, there was a new baby. One of those half-alien children (who's got a turquoise skin-tone), took the Rite of Spellcasters and became a Spellcaster by trade rather than birth. So this half-alien Spellcaster then did "Try for Baby" with Greg and wound up with triplet girls (didn't realize the leyline was on for her house that caused multiples). Two of the girls were regular skintoned and came home from the hospital in werewolf bassinets. The last girl was turquoise and in a spellcaster bassinet. I figured "ok, two wolf babies and a spellcaster baby". Yet all three of them as toddlers would get the fang pain anger moodlet related to werewolf toddlers.
I now have them as teenagers and the two regular skin-toned girls are fully werewolf. A wolf icon next to traits in CAS, they have the wolf forms and they do the howling motion in CAS and they have the wolf needs chart. The turquoise girl, however, has NO wolf OR spellbook in CAS, no wolf form, does the magic spells as her CAS motions. But her needs icon is wolf, she still gets wolf-related moodlets and the needs window has an overlay of wolf and something else underneath it that I can't see but is probably Spellcaster related. The needs themselves are reversed (bladder where fun is, fun where bladder is, etc) and hygiene is totally missing so I guess she never has to bathe again.