My first husband cheated on me multiple times, and also tried to have sex with every friend I had. Most rejected him, but my very best friend shagged him.
When I left him, his deeply religious family told me that "what he had done was just a bit of fun, whereas me leaving him was breaking up a family", and I was thereafter the villain of the piece.
His parents and his 3 sisters, whom I had been close to for 20 years, never spoke to me again. It's amazing what lengths family will go to, to protect their own.
I hardly ever see my Ex now, as the children are grown, but if I do see him, he cannot look me in the eye, it is the most bizarre thing ever. I don't know if it's shame or anger because I left. So weird.
He cheated on the woman he lived with after me and I have heard through a reliable source, that he's cheating on his current Partner. I have only met her once, quite recently, and the sadness in her eyes was haunting. I don't think I've ever seen someone exuding such sadness, like it was from the toes up.
Anyway, you KNOW you have done the right thing. If anyone suggests otherwise, I would ask them "Does your Partner use prostitutes?" They are being ridiculous.
Onwards and upwards. I have a lovely DH now, who is the polar opposite and has morals!