User blog comment:B214/Volume 22 spoilers/@comment-90.219.230.72-20161127161312/@comment-29963364-20161128024625

1.) I kinda exaggerated Rias' reaction for comedic effect.

2.) She's not "as much" the jealous type she used to be. She no longer has a problem with Issei being close with the rest of the girls, because she is close friends with all of them, and she trusts Issei to still love her above all else. But if some new, mysterious woman comes along, and Issei is reluctant to tell Rias anything about her, then Rias might have a bit of a problem. She might not react as strongly as my representation of her did, but still.