Father has an affair

there are women protection cells in every city and town. With the proof that you have with you, I think you can register a complaint against that female. they would definitely take care of it. But, prior to that, you have to become more active and gather every other information about her. Yes, you need to take charge now.

Instead of lodging a case, I am sure they have other ways to solve the problem. You can give a try.

Be brave, gather all your courage and never give up. Good luck and do let us know the result.