I feel depressed whenever I remember how my husband left me and my kids for another woman right after I gave birth to our 2nd baby. How can I cope?

It is always hard. To recover from an unwanted divorce. Have you spoken with a therapist about what happened? Given that you had just given birth you may not have had a chance to work through your feelings about what happened. It is important for you and your children to process the divorce better. Good luck and let us know if you have other questions.