TLDR Because in the previous chapter Asuka wanted to come clear to the main Protagonist Kanade went full damage control and basically forced this meeting to make them all make up with each other but in this chapter it says it all, Kanade liked the sex and the love but isn't fully satisfied fully (my guess is not that her husband is lacking but that the other guy is rougher and she came to like that) however she is ok with this and want this happiness lasts forever.