Families tend t stick with their own, especially in these type of matters.
In time the truth comes out.
As much as you want your wife back she is no longer your wife. It looks like her. It sounds like her.
But no longer acts like her.
Lawyer up. Protect yourself and the kids.
Get a good divorce attorney.
And after you are divorced I would take all of your information and nail both of those waywards as well as the school district.
Because not only are they horrible spouse, horrible parents but they are are horrible teachers abusing their authority.
Hit them where it hurts the most. Their reputations.
Not out of revenge but as a lesson they need to learn. Humility.
I had a buddy who this happened to. Him and his ex were both teachers as well as the OM.
He sued the school district and got both of them fired after the divorce. She did not get any spousal support after she lost her job.
But the kicker was she never told her family why they were divorcing. He invited her parents and siblings to the hearing. They were very surprised...