>keep having sex >cum inside her like semen demon >gets pregnant and finds out spell become permanent when pregnant >when it becomes permanent she forgets how to be,act and what it was like to be a man. >turns into a girly wife with more kids on the way.
So, how did this start exactly? Noble hires a bodyguard to travel a few days incognito? Goes with full on polymorph rather than disguise spell because one not magic-detect-able? Bodyguard intended to change and knock them up because of secret - heto - crush?