I remember reading a short NTR doujin, might be as few as 3 pages in fact, where an adventurer/knight sleeps with a farmer(I think)’s wife. The end of the doujin has the wife deciding to leave with the adventurer, the husband does not know the real reason. I distinctly remember the ending page, where the wife is in a wagon talking to her husband, lying to him about why she’s leaving. Her head and I think torso is protruding out from the back of the wagon with her ass concealed by the wagon’s sheets, and of course the adventurer is fucking her or her pussy is filled with cum while she’s talking to him