wait so did his sister's husband actually cheat or not?

… they never said he cheated what are you on?

wasn't that why she was fighting with him?

I believe they still haven’t mentioned why they are fighting.

the beginning of chapter one

I see what you mean, no as they stated it was a rumor by the co-worker who obviously got his eyes on him.

Dang it’s been a while I forgot about that part, since they clarified it right away.