Operation Rainfall writes:

"The ending of last week’s episode revealed that Kirito and Asuna would be getting married, but I didn’t expect it to be so fast! No vows were spoken and a ceremony was nowhere to be seen. I was kind of hoping for one of those special moments comparable to that of Romeo and Juliet in Romeo x Juliet, but that’s okay; I’ll live! Besides, who has time for a wedding ceremony when Kirito and Asuna are now a mom and dad? Yup, you got that right. Apparently in Sword Art Online all you have to do is find a wandering child in the woods and BAM!, they’re yours to raise." (Anime, Sword Art Online)