My wife appears to be displaying interest in my friend – twirling her hair, laughing at his jokes, and leaning in while talking to him. Even playfully hitting him. All this in front of me. First time I’ve really seen this from her in over 10 years together where I’ve felt the need to post here. It's embarrassing. I'm debating whether to focus on self-improvement, adopt a nonchalant attitude, or discuss it with her. Unsure about the best approach.