This looks interesting, but I am not sure what is going on. I am guessing that her husband cheated on her and now she is fucking the other guy because of that. BTW, thanks for the post.
No idea about what's going on, but I think it should be "ktd", "tkd". Also, looks like it's the latest in a series with the rest of the series being on pixiv. http://www.pixiv.net/member_illust.php?id=195984 I think it goes 1-1, 1-2, 2-1, 2-2, 3, 4-1, 4-2, 4-3, 5-2, and after that I'm not sure. At least another hundred pages? And it looks like there's a note telling people to buy from melonbooks instead of dlsite.com, since dlsite.com is more expensive, censors more, and melonbooks give more money to the artists. http://www.melonbooks.com/index.php?main_page=product_info&products_id=IT0000160477
The wife found that her husband had raped many girls.And the MC find the evidences in their home. One of the sufferer is MC's best friend.So the MC retalite by rape the wife. Then they rely on each other by this relationship. I had read the story on the author's pixiv main page so I know.
Base +8, Bay K.W. Arde +11, TlchildSinX +11, The Hamm3r +8, hybras +20, Ooe Kintarou +4