Need Help

[AU Bob]

Im a little shady about taking spouse's back after being WW. I mean, they have been with someone else, lied and betrayed us, we did not.
Don't get me wrong, I would take mine back, but how do you deal with what they have done, and how do you live with the fact that they could do that to you, the breach of trust, and the fact that they could switch off from you and not have empathy for you?
I don't understand how someone you have shared most of your life with, the person who has fathered or mothered your child can do this.
Social media, family peer pressure, the breakdown of morals, stigma breakdown (birth of the "Cougar"). And I think one of the most damaging, Reality TV programs.
My wife has started going to night clubs since our split, at 46 years old I would have thought that was behind her and was not age appropriate, how wrong I was. I thought I would have a look at the scene for my self, and was shocked. I attended a night club on the coast here and 70% of the women there were over 40, I could not believe it, when I was in my 20's if there was anyone over 30 in a club they were laughed at!
I believe family value has degraded to a point of almost non existence, it's become socially accepted and too easy to just walk away and focus on individual happiness, don't worry about the family unit, as long as your happy it's all good, but what about the fall out from that, the breakdown of the family unit and the suffering of the innocent other half, and children, do the therapists take them into account?
I know I had issues and I accepted that and have taken steps to address them, admittedly it was late into the relationship, but she had issues as well but did not want to work on them, the therapist told her individual happiness is what everyone deserves and I was taking that away from her.