My Wife Abandoned me for her Female Lover

I was married for 4 years now, after 8 months into marriage my wife abandoned me after pregnancy confirmation (8 weeks pregnant at the time she abandoned), (we had lot of discussions with her family, for lot of time, to come back. I was only the one trying to get back). She orchestrated those in a way that i don't find out her intention. [ well she urged me to ty for child after 2 months of marriage]. I get to see her only 6 times afterwards, in total. Fast forward 3 years, [I talked to one of her old friend, towards whom she made advance few years ago unsucessfully (i didn't know she was her friend, i met her in an forum and found the info from her education and employment info)]. Who revealed her sexuality, and gave references of few others whom she advanced in the past. I spoken to 3 of them so far, all confirmed. I realize that i'm just used, as cover. Get a child, abandon, live with the female partner. No one suspects her sexuality, i feel used. Fast forward now 1. I have no Photographs of her with her partner in action. 2. The one's provided the info, is not willing to step in the courtroom. Now 1. I put HMOP based on cruelty (without the above info, i came to know the info few days back) 2. She put DV under section 12, asked for money (in retaliation) [she don't come often to court too] I can see that 1. She want's me as her cover, for as long as could 2. She is ok, if i drop the case, she doesn't want to be back with me. all she wants is the comfort of the name of married. I can do 1. Ask the ones who gave the information to visit her (more as a token of i know the info) 2. Present the details in the court, without the photograph (with all circumstancial evidences) 3. I don't believe in shaming them. 4. I don't want to make it more complicated with Guardianship, and all those to bring them. What is the best course of action. Note: All would have guessed the partner, her mother indeed.