@Hoomanadaw@Elaias, I agree. A harem is not needed here. I just hope they don't say they'll become his concubines or anything bcuz I really love the two MCs loving relationship right now . Those four should leave, they're not babies .
義父母 means parents-in-law. Mother-in-law is google version. That's why you shouldn't google translate manga. In many cases result makes no sense at all.
@Le_Flemard If your father remarries a woman, she is your step-mother. When you get married, your spouse's mother is your mother-in-law. I think whatever term is used for it in some languages simply doesn't translate well, so it gets like that when tler's are lazy, lack reading comprehension, or use mtl. Sometimes it's also because english isn't their first language.
Also, I think it gets tl'ed as mother-in-law even when it is an adoption. Your stepmother or adoptive mother would be your "legal or lawful parent", so I think that's likely where the confusion is from.
barbiosa or knight girls will be second wife of demon lord , the first is cat woman who come to mc with dragon , demon lord and mc will be come close friend , each of them will has family but will keep stick with mc around