Responses
Could it be this manga http://www.mangago.zone/read-manga/haitoku_wa_amaku_mushibamu/?
nope, that's not it. From what I can remember, the girl and the twins are already married from the start. But it looks great though, thanks!
But do you know a shoujo manga where a girl got married with twin brothers? And they had a lot of sex too, the girl got double penetration and all that
It's not hentai tho