Monstrogamy (Neo)

Achievement unlocked! "Monstrogamy"!

You got married to a monster! You've opened a door to a sinful path. Will you walk it?

The Darkness offers its own dowry.

+2 to one skill of your choice (expires in 24 hours)

+a small sack of assorted gemstones

Reference
Unlocked in Chapter 44 "The Rise Of House Newman"