[Part 1 here](https://www.reddit.com/r/gonewildstories/comments/6yzlmy/30masturbating_to_my_24friend_in_iceland_while/). Read at least the first couple paragraphs for a description of Kari as well as what the hell is going on.
A couple days passed and I was noticing an unsettling phenomenon. Walking behind Kari up the stairs, I would steal glances–okay, more like long, drawn out stares–at her ass, each side tightening by turn, perfectly accentuated by tight pants. But one day, as she took the first step up and I prepared to begin my tortuous enjoyment, I began thinking of how she’d pulled a muscle a little yesterday, and how it must hurt, but of course she was too stubborn to say anything. And instead of holding my hand back from cupping her ass, I found myself holding it back from settling gently around her waist, ready to hold tight if she fell.
This was a problematic development. Kari was just as uninterested as ever, and in my rational moments, so was I. Nothing lay down that path but pain.
The nights stretched out, eternities of conscience-stricken edging. One morning my balls were sore the whole day–worst case of blue balls I’ve ever had.