Persephone wasn't unaware of the difficult conversations that lay ahead. At some point, she would have to tell Tate about the curse, and Addi too: she was part of the family now, even with Phillip gone. She could easily see how teasing about kissing today could turn into teasing about babies of her own another time, something that simply wouldn't happen for Persephone without consequences.
"Aye, a bit of a flashback." But she appreciated the nostalgia. "And he is. I... I don't think I knew it could feel like this with someone so soon."