Narrowing my niche

I am a marriage & relationship coach. My niche has been couples struggling with communication and conflict. My clients have been couples in all stages of their relationship. From dating, to premarital, newly married to those married decades. What I’ve realized is I like working with couples who are middle age, late 40’s and above. I also like working with professionals.
I am playing around with “Marriage coaching for high achieving successful couples who have neglected their relationship for years”. It doesn’t quite capture what I’m thinking about.
The couple who has spent years advancing their careers, raising successful kids, they look like the perfect family from the outside but on the inside their marriage is falling apart from years of neglect.
How can I put this in a concise tagline? Would appreciate feedback.