missing word: Come on inmate, get into your new cell. And no freaking out when get inside,
"when you get inside"

extra word?: ...I should probably punish you for getting staring at another woman,
"for staring"

extra word: Really, I tried my best to not get too excited being with her while she we were blowing up those balloons
"while we were"

contradicts: Soon we were both standing next to the bed, completely naked. Christie looked down at my hardon and giggled when I took my boxers off
First sentence they're both fully nude. Second sentence his boxers magically are back on.

At this point, the story's making this non-popper want to be a popper.