Dunno why people think the cheating aspect in particular is gonna be a huge issue. Hinata already knows, and I'm pretty sure it's been made clear at this point the husband and wife don't really love each other, it's more just a "professional" relationship for the sake of appeasing sociatal expectations.
I so want them to be happy together, I'll be pissed if the author bait and switches by having it end any other way ><