User blog comment:MyProjectAlicization/Kuroyukihime - Kirito and Asuna's daughter?/@comment-87.78.104.160-20130523212844/@comment-1173941-20131015045615

Sachi was said to be his first love, in an Q&A interview with fans...

However, this was back in 2005, when SAO was still a web-novel. The published version has a lot of details changed, and in fact, certain things were written in the Web-Novel, that implied this, but were later changed in the published Light Novel..