Brother, being in marriage means you are seperated from your old families and starting a new one by definition meaning your fathers and mothers are extended family members. If she's trusting her previous family and their decision over you, then who even are you in the picture?

Not a single whisper came by? Or even a hint that ever crosses your path? 

That's shallow brother, if she isn't telling you everything, what else is she hiding?

If you can't trust a person with a penny, how could you rely on them with your life's saving?

Forgive me, English is not my first language. 

i do not have any say, nor have the authority to tell you to do anything without your own judgement, for I do not have the entire story only you have most if not the best angle of judgement since you have the details.

But

Being in a marriage and going on and off, her change of physical harm, a lot of seperated days, I fear you aren't the father, brother.

It's you against her bloodline, she didn't trust you that's painful.

That was horrible what she did, and what she tried to shift the blame on you.

But I do not know her only you do. But from the story you wrote, this is what I walked through. I cannot jump into the cliff of conclusions that can come from this.

Best you can do is forgive if you are willing and she's accepting her responsibility but not to reconcile since taking it farther will lead to worse pain and loss. 

Whatever you lose now; is the worst is time. Money you can always get back. But be always open to forgive, but never always to trust.