Your mother's aunt's is your mums first cousin and your first cousin, once removed.
Your mother's aunt's son is her first cousin and your first cousin, once removed.
2nd Cousin
Yes, they are related directly to you. They are your mothers sister. And your father's sisters.
A nephew is a cousin to his aunt's son.
Your son and your aunt's son are first cousins once removed to each other.
great nephew
Step son?
Assuming that "his aunts" have reached the age of majority and that "your son" has a passport with the VISAs required by Morocco for citizens of "your son's" country, there should be no issue.
Your aunt's daughter is your first cousin, and her son is your first cousin, once removed.
The son.
My mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers,mothers, son.
to make it easier lets say ' aunts son' so that is your cousin