Being a stepmother

Not an easy job!!!  Well no one said it would be any ways. Am a stepmother and as a child I didn't have it easy with my stepmother  , so figure if I was to ever be one I wouldn't be like mine, well my step kids are beautiful there's 3of them but the hardest situation I have been having is the oldest child the way he gets his way 90%of the time and is tough for me… you see am very strict, I race my 4 kids alone they know have there on place in life, after raising my kids and stayed along I started a relationship with some one with 3 small kids ages 12, 8, and 6 so we have been at it for this past 3 years and omg am abaut to go crazy , the 2 small ones there so lovely,  they are all boys I love this kids but how can you straight three kids that Granma did everything for, how do you teach them that they need to clean after themselves how do I an outsider tell them that screaming at ur father is not right or giving hem attitude is not correct,  even hitting smaller kids… this is all the oldest child witch it know 14, the other  one is 10 and the smallest is 8, this is a big challenge I try not to but in when it's abaut the oldest since he's disrespectful… any way is a big challenge and really trying to make this work… Stepmother  a very strong word with so mutch meaning…