Ex-Wife's New Lover

I got divorced from my wife of ten years two months ago. She was the love of my life in college, but as we aged and responsibilities increased, our relationship became strained. I couldn't cope with her constant need for control over everything, including sex, which she treated like a routine task rather than an intimate expression of affection. After the divorce, I struggled to move on emotionally until I started seeing someone new, Jessica. We've been in an open relationship since I separated from my wife, but after some hesitance and soul-searching, I decided it was time for something more serious with Jessica. She's everything I want: spontaneous, adventurous, and always enthusiastic about exploring our desires together. But tonight, when we got back to her place after dinner and drinks at a cozy Italian restaurant downtown, things took an unexpected turn. As soon as the door closed behind us, she started undressing me eagerly. Her hands moved swiftly across my body, her mouth trailing kisses along my neck and collarbone. It was intoxicating. When we were both naked, Jessica guided me to lay on her bed while she straddled me. She leaned down and whispered in my ear, 'Tonight, you get everything you've ever wanted from your marriage.' I felt a mix of anxiety and arousal, knowing what this moment represented. Our hips aligned as we moved together, our bodies finding rhythm. Jessica's breasts bounced with each thrust, her skin glistening with sweat. As the minutes passed, I found myself lost in pleasure yet feeling an eerie sense of familiarity, like revisiting a long-forgotten dance that suddenly felt all too intimate. The sex was raw and uninhibited; every touch sent waves through me. Afterwards, as we lay tangled under the sheets breathing heavily, I couldn't help but feel like I was betraying my ex-wife's memory even though she no longer held any claim over me legally or emotionally. Was it normal to still carry these feelings? Should I be focusing solely on this new chapter with Jessica? What do you think is going on here? Am I the asshole for feeling guilty when making love in a way that makes me feel alive again?