I agree with my colleague Ms. Findlay.
On the idea of expecting “relationship” to be stretched, especially when the clear intention here is to have a clause aimed at what we're calling the battered spouse syndrome, I think having interaction and communication as a separate item really ensures that we don't confuse the two. It's a non-exhaustive list, but I don't think it hurts to mention that, because people increasingly use the Internet to threaten or harass or do that sort of thing. That's a communication. You'd hardly call it a relationship, but it is obviously important.
I think adding that doesn't do any harm, and it certainly can't take away from what, generally speaking, we're intending in the previous clause.