Name changed for this.
I've been with DH for 37 years, married for 27, we have two grown up children, one of which (DS age 22) still lives at home.
I found out via google maps (which tracks him as well as me because we share an email address) that he has been visiting a swingers club once a week when he said he was at the cinema.
I confronted him and he initially denied it, then admitted that he does go there but claims he only uses the sauna. He said it was relaxing and I should come with him sometime.
For context our sex life has been very sparse recently - it was never great, I don't have the greatest sex drive and recently weight related issues have meant he has ED. His whole family had weight problems and he has always been overweight except for a brief time about 10 years ago when he put his mind to it and got down to a healthy weight which lasted approx 6 months. His Dad suffered terribly in his latter years and died of conditions where his weight was an aggravating factor. I have warned DH til I am blue in the face that he is heading in the same direction but he can't/won't do anything about it. If anything he has headed further into obesity.
He's a lovely guy and our family life is great. The kids would be gutted if we broke up. Financially we would both be living on the breadline if we tried to maintain separate homes, and so much of our lives are intertwined I can't begin to imagine how I would go about unraveling it. But I can't reconcile myself to spending the rest of my life with someone who refuses to address their own health problems, potentially making me their carer within a few years, while they go to seedy clubs.
He says "nothing happens" at the club and nobody would be interested in doing anything with him there because he is "hardly an adonis", but even if that is true I have no doubt he would go through with it if someone was interested. I feel as though it's the final nail in the coffin of our sex life, due to threat of STDs etc.
I genuinely don't know what to do, and whether I'm making too much of this. Grateful for any perspective really.