I can see both sides of the argument on this one. It’s a classic case of miscommunication that fuels a lot of debate among fans.
From Logan’s perspective, he genuinely believed that he and Rory had broken up after their big fight. Acting on that assumption, he slept with several of his sister’s bridesmaids. To him, the relationship was over, so his actions weren’t a betrayal.
However, from Rory’s point of view, they were just on a break or taking some time apart—not officially broken up. For her, his actions felt like a definitive act of cheating. The core issue wasn’t just what he did, but that they had completely different understandings of their relationship status at that moment.