Responses
No, there's a whole tankoubon, released in 2014 in Japan, with 5 chapters and an extra "My two sons are fighting". You can see it here: http://www.mangago.me/read-manga/futari_no_musuko_ni_nerawarete_imasu/mh/c001/8/
is there only 3 chapters to this manga? It shows in the content page there should be more chapters..... ┗( T﹏T )┛