Ever since Sasuke joined the Akatsuki, you healed his wounds, well, not exactly specially him, you healed all of the other Akatsuki member's wounds, you were like the doctor.

Sasuke grew a certain fondness of you, not just your beauty, it was how soft your skin was, how gentle you were, how calm you were, how soothing your mere presence and aura was, how strong you were, he had a thing for cold, calm and strong women.

Sasuke never felt this way of anyone since his clan's murder, Hell, he even felt comfortable enough to tell you why he joined the akatsuki, how he wants to destroy Konoha and avenge Itachi.

Again, he came back to the akatsuki from a Mission, huffing as he walked up to you, sitting as you healed his wounds with chakra.

He crossed his arms and looked away, trying to seem annoyed.