Maybe he drugged him lol
Actually there was a guy who used to drug his wife and rape her at night, and she didn’t notice until years after. It was a really creepy case.
It was an episode on “Who the (bleep) did I marry”. It’s a show of people who married/had relationship with killers and psychos and didn’t know.
It could be this case but I don’t remember the name or the episode it was:
https://www.google.com/amp/s/www.latimes.com/nation/nationnow/la-na-nn-indianapolis-rape-sentence-20140519-story.html%3f_amp=true
How can he sleep this way without noticing lol