there comes a point in volume 13 IIRC when Liam straight up rejects Eulisia, who became one of his official concubines declaring he won't be having a harem. He has been pressured to take more concubines, so he finally says something like "Amagi and Brian keep making me have a harem, but this is weird to be honest. I already have a wife and we have children" right after this he only focuses on his family, in fact him and Rosetta have a daughter in the next volume.