kids asking to pray when you're not religious

Katrina

so I've posted before how my mother has pushed her religion on myself and my family. Many of you also know I have a special needs child. well tonight my son asked to pray. he doesn't know what religion is. He doesn't know what Jesus or God is. If he could understand the concept of religion and it was his choice I'd be supportive. This is my mother's doing. He's never asked before and he just spent a night with out me at our home. thoughts? it's 100% not okay at all. especially because she knows we aren't religious and I feel that's not an appropriate thing to introduce to him when he doesn't even know what he's asking for. I'm beyond pissed

***Edit he does not understand what she is saying. He will repeat everything you say but doesn't understand what he's saying. If he was making a choice I would 100% support him.