As a linguist, seeing you overthink your translation was so distracting lol. It's fine. Swell = means the penis swole with the bloodrush, in other words it got even harder. Fret is fine when he was arguing after cumming to fast. He was just a bit embarrassed and fretted over that.
The no face at the end "yipiee! I was just bird watching and enjoying this beautiful nature a moment ago. Now Im gonna rape a cutie, then I'm gonna sell it to the brothel, then I'm gonna make some money and then maybe catch some fish :))"
Gaaaah, this guy knows how to make women swoon. But why is he dragging her on with this benefits relationship? Why isn't he confessing? He already said she likes her ffffs
Me skimming through his sob backstory... *Yawn*