User blog comment:B214/High School DxD EX/@comment-27491790-20151228155032/@comment-82.60.176.170-20151228175550

If I'm not wrong Airi was talking about cooking, and since the mother of Issei cook with her, Rias and Akeno in the present timeline it's obvious that the one who are grateful are the ones who don't cook, so Issei and his father. lol