You are second cousins to each other.
Your aunt's daughter is your first cousin.
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
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.
to make it easier lets say ' aunts son' so that is your cousin
Your mother's aunt's son is her first cousin and your first cousin, once removed.
First cousins, twice removed. Aunts daughter is your cousin. Aunts daughters daughter is cousin once removed Aunts daughters daughters daughter is cousin twice removed.
Harry's cousin's name is Dudley.
In-laws are not related.
Your son and your aunt's child are first cousins, so your son and your aunts grandson (the son of your aunt's child) are first cousins, once removed.
Your great aunt's son is your parent's first cousin and your first your cousin, once removed.