Dear Sir/Ma'am, I have been facing serious problems with my husband for the past three years due to his extramarital affair. He is involved with a colleague, and they frequently exchange inappropriate messages and calls. I have collected proof of their communications. We have been married for 12 years and have two daughters together.

I understand your situation and the emotional distress you must be going through. In India, adultery is considered a ground for divorce under the Hindu Marriage Act, 1955. You may consider consulting with a family law attorney to understand your legal options regarding divorce and seeking custody of your children.

Additionally, you may also have a case for mental cruelty under Section 498A of the Indian Penal Code, which covers the subject of cruelty by a husband or his relatives towards a woman. However, it is essential to gather concrete evidence to support your claims.

If you have collected evidence of their inappropriate communications, it could be helpful in legal proceedings. I recommend discussing your options with a lawyer who can guide you through the process of protecting your rights and interests in this difficult situation.