She married the first guy she fell in love with. Yes, it ended in divorce, but that happens to a lot of couples all over the world. So, she's dating again. Good for her. If she wants to sleep/live with them for some time before she commits to another long-term relationship (marriage), then that only means she's learned her lesson and doesn't want to rush this time around.
For me that's not a sl_t. TAYLOR SWIFT on the other hand.....