User blog comment:B214/Volume 22 spoilers/@comment-182.185.45.106-20170824131848/@comment-10330822-20190113013603

Like I said, screwy.

No one said she wasn't a freak, but its pretty clear he "devotion" shouldn't really be put into question because of it.

Also, like I said, I really question how much S&M play is considered sexual in the author's mind, my intution says not very much. So, like I said, it isn't anything to get worked up over.

She straight goes brain dead when Issei possibly dies, only allows him to see her naked, only allows him to whip her.

As screwy is, if you can't see that she puts Issei on a higher pedestal, then I don't really know how to help you.