Spouse is cheating rumor

My (me 35) wife (36) of 11 years has a guy friend, and I dont like their relationship. She claims it is professional - she says she is doing some in-home care for him for the past 2 years, often bringing our 3 kids there to be with his kids.

Today, while my wife is at her regular hospital job I had an unexpected visitor. This person wanted to share with me that the rumor in that neighboring town, and now my town is that she's having an affair with him. I can see how that rumor could be true, or not true.

We went over this in couples therapy. I didnt like the extent of her involvement with him. I was perceived as too controlling over this, its not ok for me to ask them to stop their "working relationship" She is adamant they don't have anything other than this working professional relationship, although I disagree. It has been emotionally taxing on me, caused a lot of marriage rifts, and I felt she has emotional draw to him.

My wife has been naive about other men before. She is too friendly in my eyes, but she has told me when they take it too far and cuts them out - it happened several times in our marriage with what I thought were inappropriate relationships. I could always see these other guys have different intentions than just being friends, and my warnings fell unheard about them.

This current one, is a bit different. He does have medical issues, and there are truths in her explanations. He is able bodied and I feel he exaggerates the help he needs. My wife does a lot of household things for the guy. I think some of it is complimentary, unpaid.

But now I have someone else coming to me and telling me they are having an affair, and apparently everyone is talking about it.

Im not sure how to proceed from here. Id love to get a look at her phone to clear the air, but she is very protective of it (sus) and there are a lot of other things that make me uneasy.

Also, we have a dead bedroom, we had sex last week after 3 months without, and have been doing pretty good lately.

I dont know what to feel, or what to do next. If she cheated, its over, and I know I'll be fine in the long run. If she didnt cheat, thats good too.

It sure is embarrassing to have the town talk about me.