no, commenters, Nakiri cannot find herself a wife, because women cannot marry women. this is a manga that knows what men are and what women are, so keep your perversions out of it and let that line be the joke it really is.
I think you all are mistaken on the point of this chapter. The author isn't mocking nor praising lesbian marriage. He is just messing with people who will go heels over head to defend or criticize sometimes ambiguous statements. Do not forget, Shiba-san can be you.
Man what is it with people misinterpreting jokes and going full fujo with their fanfiction? It's also really funny that the same people who would claim to be ok with people doing what they want are saying what someone "should" do. I knew as soon as I read that line people were going to do this.