Your wife looks in good shape! You have done well to get her into this so readily and it's pleasing she has taken to the lifestyle like a duck to water and been so busy! My wife was 35 when she first took the plunge, but that was when we'd been together for 12 years and after about 2 years of me suggesting it, persuading her and encouraging her.
Later, when she was 44/45, she enjoyed even more extra-marital cock with my blessing, including a former workmate of mine and 2 guys in their mid-late 20s. She confessed a preference for young cock and saw it as an ego boost being able to attract men of that age.
Peter C