I didn’t understand it either, his fiancé was thinking like that but I’m lost in the translation ╥﹏╥
I think they were talking about the rumors/reports saying that she was his lover because of the way Jeremy reacted that time (or maybe it was just a mis-translation)
I translated it on my own. And it says:
"Neuvanstein's loin was half crazy with longing for a dead women"
Because their symbol was a Loin. I think they meant instead of lover as in a 'couple'(...) But as in someone they just 'love'.
That makes more sense thank you ヾ(❀╹◡╹)ﾉ~
I'm a little bit confused at the part where they state that Jeremy went insane by longing after his dead lover. Did Jeremy have feelings for Shuli in her past life??