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.