@Lilliwyt You dig too deep into yuri NTR, while this fetish is memetically known for purely formal resistance and the subtle "cheating with another girl is not very serious". Even the classic straight NTR with milfs has more realism at all.
@Cyro11 NTR was originally created to give such emotions, it is a subgenre of taboo moe. Check out the regular NTR douji, they literally want you to feel bad. No wonder the NTR as a fetish has so much with cuckold. Another question, yuri NTR really shows how many yuri fans have such a great obsession with yuri that they can justify absolutely any toxic behavior of the characters, including harassment and rape, if it is yuri. This is quite ironically combined with the way they react to male characters in regular all-female work, isn't it?