What? I thought he built machines to fight demons.

[ That is 100% the first thought Yenh has to Aymeric's sudden panic. ]

[ But she's even more aware of the dangers and risk of pregnancy than he apparently is; which is why she sits up, grabs him by the wrist, and pulls him back toward the bed. ]

Ah- Aymeric, be calm. It's safe. The alchemist- gave me a remedy to render me temporarily barren. Your seed shall not quicken in my belly.