Must be a conflicting mod as I have no problem with having spouses and concubines together

Its more so rather than stopping with the plus it keeps adding portraits and messes up the whole main character window. not really sure how to fix my self. But i think it needs a cap of 5-6 portraits and the the plus icon for the 7th on the main window.

if you run the mod with
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2318880283&searchtext=harem

and get more than 7 concubines you will see the issue. its likely the same for spouses as well

It's not a conflicting mod, it's a problem with this mod. And he hit the nail on the head identifying the trigger, but I don't think 7 wide is the underlying issue because 7 family works just fine.
Here's a pic showing the issue (in middle) compared to character without the trigger (left) and character with the trigger, but hidden because traits are shown instead (right). https://imgur.com/a/YugwCNv
I wish I could help you with the fix, but it's above my current skill level.

Maybe when the spouse/concubine hitting 7 triggers the row needing to be able to be clicked on to expand it, at that point there is an incorrect entry for width of the trait window