Serenity couldn't bring herself to refuse, and by the time she came to her senses, she was already lying in bed with Jackson.

She sighed and thought, 'So what if we're sleeping together? Whatever. It's not like we've never done this before.'

But lying in bed now, she couldn't fall asleep because he was beside her. So Serenity decided to bring up a topic. "Why do you still call me 'Sis'?"

"Don't you like it when I call you that?" he asked.

She hesitated for a moment. "It's not that I don't l