Your step son can be your father if he was previously married to your mother, making him your step father.
Matthew is either the son or step-son of his father's wife.
step brother
Your mother's new husband is your step-father and you are his step-son or step-daughter.
Can't happen unless there's some step-relationship here, such as a man marrying his step-mother, the wife of his father. That still makes you your father's son in any case, but now you have become your father's step-father. Real messed up relationship & family here!!
Your Step-brother. If he isn't your brother but he is your father's son, he's you.
Biologically - No. If that person is a step-father - Yes
Step father and son
The doctor is his MOTHER!! Unless his mother is dead well then its his step father
George Washington, the Father of Our Country, had 2/two step-children from his wife's, Martha's, previous marriage. 1(one) step-daughter and 1(one) step-son.
When your mother remarries a man he becomes your stepfather (assuming you are son or daugther)
Once a stepfather legally adopts his stepson, he is no longer considered a stepfather; he is legally recognized as the boy's father. The adoption process grants him all the rights and responsibilities of a biological parent, and the legal relationship is that of father and son. Thus, after adoption, he is fully integrated into the child's legal family structure.
Often the step son misses his biological father; some sons resent another man coming between his mother and the son. It takes patience and time to win over a step son. Don't try to take the place of the biological father, but treat your step son as a friend. Perhaps go camping or fishing together even if he doesn't want to go so you have a one on one with him. If he is into sports then be there for the games as much as possible; help him practice if you can. In time he will mature and also warm up to you. It is also wise to let his mother do the disciplining at the present time simply because you are not his biological father.