He is insane or his intuition level is over 9000 (pretty slow though... she used to cheat on you but not anymore, well unlike someone she didn't do the deed!).
No She's not having a good day. Women's sexuality is 99% psychological. If she,s not feeling well. No matter the reason. She won't be down for sex. Ever! What he did was trying to force himself on her. Thinking your spouse is cheating on you the second she refuse you but you refused them a million time is somehow okay is 100% selfish.
I need to disagree with all the raw % you gave.
She get's home feeling really bad to the point of crying in the bathroom. She's working super hard on her own self. You pushed her away 63452 million times and the one day she says no to you shoving your hands in her panties and your first thought is ''OMG SHE'S CHEATING ON ME''. Dude. really?