I saw him when Clary brought him back to the institute an he wasn't the Simon I knew he had his memories wiped of me our love and our passion and our child on the way....., Isabelle Lightwood was devastated after Simon had his memories wiped while wondering how she is ever gonna tell him her unborn child was his with his memories being wiped he wouldn't remember any of their passionate nights or their stupid little arguments about her wanting to cut her hair.