Seperated. Few questions about wife

In Georgia there is no legal seperation. Just stating you ate not engaging in sex. Which we have been until recently. Bad move, I know. But we are still legally married, and she has BF who she just took our child to spend the weekend with. It's not the first time. He saw them hugging and is upset. We have him 50/50 now but when he is with her there is no stability. She's living with her parents and she is taking him different places every weekend. That's not good to me. He should have a stable normal routine. Am I crazy? Does this effect her in a bad way as far as divorce goes ?

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