no contact, never contact her every now & then to keep you in her head.
You've been with her for a few years, there's no chance of you ever being out of her head, trust me on this.
Everything you have to do right now is counter intuitive.
You want to contact her: DON'T!
Contacting her family: probably wasn't the greatest idea. Remember that no matter what she does and even if she is at fault, they will always support her over you any day of the week, she is their kid and you are just the son in law. I know you said they are good people and you can continue with that knowledge just don't think that they're going to side with you on this at least not yet.
No contact.
After 4 weeks of no contact, you should consider dating other women, another counter-intuitive idea but here's the thing: your wife has her own place, there is a reason for that, she needs her space, individual space so that she can possibly invite the OM over to spend time with and you won't be in that environment.
It sucks to hear this but this is usually the case with the WAW's. Space & separation usually equal time to spread my wings and sow my wild oats.
No contact for 4 weeks, work on improving you, go to the gym, get some personal counselling, work on personal development, regain your individuality, spend time with your friends, get out there and live life and be happy without her.
If you're sitting at home, wallowing in self-pity, being sad, begging, pleading for her to come back it won't work.
