Uchi ni Kaeru to Itsumo Kukkoro ga Iru - Ch. 3 - Holy Knight Marguerite (3)

[Jergens]

He's just in full-on mode to make Rei appear as the scummiest man on earth . He'll never agree that Rei immediately stopped when he felt it wasn't a dream instead of going "Uoohhhh, it's not a dream, so it's real, I'm lucky, I'm gonna r*pe this tied-up woman all night now."

To be fair he still debated whether he was dreaming or not right up until the moment he's run through and "killed". Since she shut down any chance of him concluding on his own when she broke her bindings, we don't know whether he would've stopped and freed her or continued to rape her after his initial doubt. The scenario has a lot of assumptions you can make on whether or not he'd do X Y or Z based on his character archetype of "virgin teen", but at the end of the day the author is kind of a hack and it's not worth the effort to analyze.