Let me tell you something – biological or otherwise, if you are a good mother/father, your title will never matter or require clarification. Being a biological parent doesn’t exalt authority over another parent except in cases of the law, and even then only if acting in the best interest of the child – when the parent can’t manage it on their own. The title or biology of a parent doesn’t make someone a parent anymore than standing in a garage makes them a car.
In a world heavy -laden with competition, one-uppers and an insatiable desire to discredit or disqualify anyone that is disliked, misunderstood or written off by unpopular opinion - now more than ever you need to know the truth. God doesn't disqualify sinners, people with a past or imperfect Christians. He actually seeks them, dines with them and loves them.
Did I feel like a jerk and a failure on the days when I couldn't hang with the super stepmoms? Sure. But you can't base your days or family dynamics on other blended families or stepparents. It's okay to not have it figured out, it's the quitting that's bad. You have to ask yourself why God has put you where you are and how you can be used for good. There is a purpose to his plan, and you are more than capable.
Co-parenting with a narcissist is like being the tin man from the wizard of oz, having motion sickness, on the downward spiral of a roller coaster, with a loose harness, after eating ice cream and 5 corn dogs - doing the tango with a peg leg and an eye patch all the while sewing back together and re-stuffing down feathered pillows your dog chewed up and scattered throughout the back forty - it's freaking difficult!!