User blog comment:B214/Talk About What You Want! 2/@comment-108.27.243.235-20140707032420/@comment-24866657-20140707095559

@B214

The point is in Issei's case Rias as his girlfriend/fiancee/wife accepts Issei's harem while in Raiser's case she could be barely know his Peerage and didn't show any approval of accepting them as the mistresses yet.