When that word came out of his mouth, Serenity and Jackson both froze at the same time.

How long had it been since she had heard him call her that…? Serenity stared at the person in front of her in a daze. There was a time in the past when he would still occasionally call her Sis even though they were already dating.

Because, to him, she was more than just the woman he loved – she was also his family.

He said that calling her Sis made him feel less lonely.

Serenity raised her free arm and ge