The whole: "oh boohoo I'm going to have sex with her



" shtick has gotten old 2 arcs ago, but at this point, it's already grating.
It made sense at first. But it was already time to switch to: "well maybe having this family isn't all that bad" ages ago.
The MC just seems like a bitch of a tsundere, not someone who actively resents his "wife" and his situation.