Gilbert told us he got an email from Laura's people saying they were going to try and take custody away from him, and TMZ Sports has learned he told the truth.
Our sources say Laura -- who currently has primary physical custody -- will go to court and ask the judge to significantly reduce Gilbert's visitation. She also wants the judge to impose safeguards so the kids aren't put in dangerous situations.
As one Laura source put it, "This is just the straw that broke the camel's back. He's done many other things."