What is he thinking!?

We do not speak like this at home (however his grandparents do) nor do me and his dad show any type of affection except hugs and kisses in front of him. I seriously want to beat this child. (Not in the literal sense) I am fuming!

He will be 7 in July. He’s in first grade

*yes these are from his teacher. We have a parent communication app called class dojo and this is how we communicate throughout the day. She did say he wasn’t the only one touching other kids and she had to have a class talk about it. The bad language on the other hand I know he probably learned from my mother as she has a bad potty mouth and I have done called and had a talk with her immediately.

The only other people he is around is his dad and whoever goes around him while he’s there. I only work 3 days a week and it’s during school hours so he isn’t around anyone else except us.

I’m very upset with myself I feel like I’ve taught him better than that. He has had a very smart mouth lately and idk what’s gotten into him.