Looking for guidance and clarity, please duas appreciated

Assalamu alaikum. I’m 30(M) and my wife is 26(F). She was married before for six years. She tried to make that marriage work, but it was a dead bedroom - he wasn’t interested in intimacy, was verbally abusive, and showed her no love. She comes from a strict religious background. Around the fifth year she wanted to leave, but her family pressured her to stay and “try again.” During that time, when she had emotionally checked out, she began talking to another man. It lasted about a month and they met a few times (she says 4 or 5). She insists it was only an emotional connection and not physical - she says she needed someone to talk to because she felt alone and unsupported. She deeply regrets it and even told her ex-husband about it then. She has always prayed, read the Qur’an, and fasted, and has wanted to improve herself even before we met. That’s part of why I married her. The issue is she initially lied to me about how she met that man. She was ashamed to admit she spoke to someone while still technically married, and I can understand the embarrassment, but that lie has caused me a lot of inner turmoil. I keep obsessing over whether it truly was only emotional or if something physical happened that she hasn’t told me. I love her and want to trust her, and I also want to protect my heart and our marriage. I’m struggling with doubts and sometimes feel guilty for not being able to move past it. I don’t want to make unfounded accusations, but I also need honesty and peace. Any advice from brothers and sisters on how to approach this gently, seek the truth, and heal our relationship in an Islamic way? Should I ask her directly again, involve a wise elder or an imam, do more du’a and sabr, or consider couples’ counselling with someone who understands our faith? JazakAllahu khair.