Honestly I was expecting the Goblin Hag to fall in love midway through after that whole discussion about the debuff effects and the death curse. Hell, we haven't seen a corpse, so I still think there's a chance that the Goblin Hag will appear at some random point to attempt to bone her newfound husband as per the general rule of You Strong, You Good Mate, Must Procreate, SNU SNU laws that some monster girls abide by, only to be parried by the main Erofu virgin heroine who is constantly teasing the MC with the possibility of UOOOOOH TAKESHIIIIIII SUEEEEEGGGSSS that he will deny by selectively not hearing anything and misunderstanding her advances and will likely only ever get to second base or a kissing scene after we've established the entire harem.
Well. That's just a Theory. A Manga Theory. Thanks for reading.