I thought the translation in this one was a bit off tbh, the words used in Japanese translated here as wife and concubine are "Seishitsu" and "Sokushitsu" respectively, whereas a more accurate translation would be main wife and side wife. Samurai did it all the time to make sure they actually had an heir, one famous example is one of the Tokugawa shogun's who had like 40 concubines or something, also someone write the wholesome r18 doujin for this pls, need