User blog comment:Animegeek1689/Does Issei really love Rias?/@comment-26537683-20150627170904/@comment-1359322-20150627172044

Well love itself is a subjective topic, plus there are various forms of love like parental love, familial love (siblings, grandparents) etc.

In fact coming from a place where in every 50 families you can find 3-4 families with a mistress or two, those are even more apparent. I've seen families that has 2 mistresses and 6 children, 2 from the mistresses yet the family has a good relationship, similarly there are family even with only 1 wife yet they can reach to the point of divorce. So in the end the true worth of love at the end lies not on whether they love each other but whether they love their "family".

So to me the most important thing in the relationship is at the end of it which is the family. How the family is formed will be the true determinant to whatever Ise and Rias' relationship will truly unfold.