What is the standard etiquette here? Is there a Hallmark card for this?

One of my Facebook friends is in trouble with his wife for flirting with his female friends. Not me; I can clearly see he prefers men, but some ladies have trouble sensing that. Anyway, how can I let him know I'm thinking about him without looking like a potential homewrecker to the wife? They have the cutest kid, and I want them to figure it out. Plus, I want him to know that his wife needs a massage, chocolates, flowers and a nice bottle of champagne. What to do?