Cheating

Hello..! My wife cheated on me with her relative which she frequently meet at her mother’s home, I caught her via instagram. They chat, and video chat with one another, she became nude as per instruction by her boyfriend in instagram chat like he said remove your clothes, she removed, he said stand little far away, the guy was masturbating describing himself in bathroom and said doing by my hand. Thats it. I got to knew by this she undressed on camera and he masturbated, he described her boob size also as her breast are different in size due to breastfeeding. Moreover, she confessed on call which i recorded on my phone. We both live in delhi. I was working with low salary as my business failed, I started a new job. I have a daughter of 2 years old. She never came to my house for apology, yes, her parents were asking for apology. Whats my scale as per filing divorce case and Alimony..? I am really depressed and has past history of epilepsy. I dont know what to do. Law favours her in any case. Marriage registered under special marriage act.