Last update was indeed very nice.
I like that the corruption of the elf is not a sluttification (i.e. pure girl suddenly gets completely obsessed with sex and becomes a whore). Instead, the bull/ugly bastard convinces her that taking a bath together/having his dick exposed in front of her etc. are not sexual acts at all and completely acceptable. So it's less becoming a slut and more subtle mind reprogramming.
This wouldn't work in every scenario, but for an elf whose race has a complete lack of understanding animalistic (human) sexual desires, it can be conveyed somewhat convincingly.
Bonus points if later on, MC gets angry at the ugly bastard for making advances on his GF, but the elf starts being protective of the ugly bastard instead because she doesn't see his advances as sexual and considers MC angry for no reason - which would go against her noble views and increase the emotional distance between her and MC even further.
I will write a longer review if I find the time.