User blog comment:B214/Question and Answers 6/@comment-24098614-20161119184223/@comment-87.4.188.116-20161119220417

Considering that in EX, with Issei's childrens, the oldest one of his children is Akeno's son I guess that sexually they didn't have any problem.XD

Anyway, remember that Akeno is a SM but she has also a cute side that she likes to show only when she's alone with Issei in which she acts like a normal girl, so I guess she likes any kind of sex. And by the way she's dependent on Issei more than anyone else (even more than Rias), so Issei could order her everything he wants and she would accept (maybe a threesome?lol)