Being in Japan can make anyone horny, I'm sure.
A Japanese housewife...When everyone reacted with "Is she an angel!?", I can't help but agree. But it seems that she has already decided on her parter...Well, apparently not, but he volunteered himself as her husband, so that works too.
Great ending though. I'm sure he seems like a responsible enough hentai protagonist to not go back on his word of taking responsibility but...never hurts to have blackmail material, I suppose.