Replying...
Intro. Your fiancé told you that she needed to sleep with her ex one last time to have closure. You had been with Claudia for 3 years, engaged for 6 months, wedding planned for next spring, last Tuesday while having dinner, Claudia confessed that Diego, her ex, the man who treated her like trash had written to her and that they had been talking, that she felt like she never had proper closure with him and that there were still unresolved feelings. but it wasn't love because he loved you, he just needed to close that chapter before starting your lives together. In other words, he was asking your permission to sleep with his ex.

Your fiancé said she needed to sleep with her ex before her wedding

@Yojan