[Umamusuko] Altria Lancer and horse (Fate/Grand Order)

Artoria Pendragon and her darker alter become locked in a heated bestial encounter with a massive stallion, their bodies intertwining as the horse's vigor overwhelms them. Months later, the alter discovers a swelling belly that signals a child conceived in secret, prompting a frantic confrontation about the missing messages and the looming responsibility. The story weaves intense intimacy and emotional conflict, highlighting the raw physicality and the shocking revelation of a hidden pregnancy.