I want divorce and child custody from an adulterous wife

I have caught call recordings of my wife doing sexual talks with my friend as my one year girl child is with her and listening everything. In one call recording they both are confessing that they had been intimated in my house on the couch of our drawing room. I have also register entry of him coming to my place to meet her in my absence. Also i have hidden audio recording of my wife confessing infront of 5 persons including his sibling that she has done this act. We have sent her to her mother home with child. But now i want my child to be with me as thet are not capable of doing anything for child. They are not well educated. They dont have active and regular income source. They dont maintain higeine. They cant afford medical of my child. Other than that they have abusive enviroment which can affect my child. What should i do in this case. Should i take her back with child? Can i take child with me leaving her there. What are the quick actions. I want diborce. I wAnt child custody What should i Do?