The fact is that some of the perks contradict the ending of "the willing cuckold." Usually in games where such a development is considered, there are 2 options -
1. the girl / wife does not want to leave her husband / boyfriend, and persuades him to such a relationship.
2. This is the initiative of both in this couple and occurs with their mutual consent.
But the later stages of some perks, literally, in plain text, they say (I'll put it under the spoiler, if you want to remain in the dark until the very end, don't read it.) that Asuna doesn't give a damn about Kirito, she's not interested in him anymore. For her, Inoda is a god, she loves him, dreams only of him and his penis, and dreams of having children with him. From this we can conclude that the main initiator of such a relationship is Inoda and Kirito (if he wants to become a willing cuckold). But it already looks strange, why does Inoda need Kirito to watch him during sex with Asuna. I think it's ridiculous. Inoda wrote on his blog more than once that he wanted to get rid of Kirito so that he would not interfere with his plans for Asuna and generally disappear from their lives. It can be concluded that the information from the perks, Asuna's wishes and Inoda's wishes, literally contradict this ending.
P/s King of Summer game has a storyline in which the main character persuades his ex-girlfriend to let him watch her and her partner. As a result, after sex, they just decide that it's complete nonsense and kick him out. There, the girl says that it's kind of weird, and she doesn't need a man who doesn't mean anything to her now to be watching her. It looks logical.