A new study by Slater and Gordon on the difficulties faced by blended families finds that two thirds of step-parents don't feel they will ever be fully accepted by their stepchildren.
The study also finds one in five have come close to breaking up with their partner over their step children.
We take a look at case study Melissa McFarlane and Kris Buck from Blackburn. Her son Riley was seven when Kris moved in, and he struggled with the adjustment.
Plus, stepmum to two Samantha Brick says she always felt second best but has now turned things around, and agony aunt Donna Dawson shares her advice for step-parents.