When your ex's new partner tries to parent your kid
My 10yo came back from a weekend and mentioned that his mom's boyfriend was "helping him with homework" and correcting him at dinner. He seemed bothered by it. I didn't make a big deal but I'm bothered. That's my kid's other parent's job, not her new boyfriend's.
Should I say something to my ex? I don't want to be that guy but I also don't want some dude who's been in his life for 3 months trying to discipline him.
I'd bring it up with your ex separately, not the kid. Like "hey, I want to make sure [kid] is comfortable - he mentioned your boyfriend was correcting him at dinner." Keep it factual and not accusatory. She might not realize how it's landing.