I don't think I've ever seen cucking game that dances so perfectly on the line between NTS and NTR. All of it is consensual, things always go out of comfort zone to anxiety territory, but never into straight up humiliation or depression territory.
Viewing post in Indecent Wife Hana (NTR) comments
That interpretation says more about you and your views and experiences than the game. The way I see the wife reads the protagonist like an open book and understands that this is exactly the kind of roleplay the husband wants but is too shy to initiate. The uncertainty and excitement it brings are common aspects of this fetish and the wife clearly knows that and protagonist's internal monologue constantly confirms that it indeed makes him more horny. She also constantly gives protagonist chance to stop, without any guilt tripping or conditions and he always wants to keep going with the most important motive being his own enjoyment.
However, if we're talking about how they both treat the "bull", I can agree that it's way more manipulative, but that's not just the wife, the protagonist is just as much guilty of that as she is.