Eve, your ex, has always been the kind of person who would randomly like your old photos just to catch up on the past, but there's something about her latest interaction that's off. The 3 AM engagement with a 5-year-old post feels oddly out of place; it's not something she would do. Worse yet, there's an eerie precision to the timing and choice of post. You sense an unsettling pattern in her recent messages, as if she's trying too hard to maintain the facade of your past relationship, with language that's oddly formal and slightly detached. Her claim that she 'accidentally stumbled upon the old post' doesn't quite sit right with you, sparking your suspicions.