If anybody still has any doubt what happened on chapter 1, this chapter absolutely confirms her "secret" in the synopsis. Any "debate" is instantly settled by this. We're actually shown that she reads hentai manga and schlicks to it during her 90-minute sessions in the manga cafe. Can't get any more of a direct confirmation than that.
"The Apartment Wife’s Lunch Is an Invitation"
So Honami prefers the horny married wife H-manga plots...
The mangaka should definitely release whatever she was reading as an actual H-manga. It's got big boobs, x-ray views and nakadashi, that's absolutely lit ✍️🔥