Board Thread:General Discussion/@comment-35898511-20190911120649/@comment-29602226-20190922111710

The canon answer to the OP is: Yes, an Incubus who had sex with a woman would monsterize her, but that almost never happens, since Incubi tends to feel sexually attracted only to Mamono...

Timjer wrote: Zel311 wrote: Your lifespan grows to match your wife's including becoming immortal if you are married to an undead. I know it's true that Incubi married to undead become immortal, but can you remind me where that was first said? I can't seem to remember.

I think it was in the description of the incubus in the World Guide I: Fallen Maidens.

Timjer wrote: Zel311, no that's not what I'm looking for. I'm pretty sure it was said somewhere else earlier that Incubi become ageless if their wife is an undead.

...Which makes me wonder, if there a single undead in a harem, does the entire harem become ageless?

Yep. Harem's members all share the demonic energy they pour in the husband, so they all live longer, and each have lifespan as long as the husband's...

I think it would probably work with some Magical Material mamono too...