The son of an AUNT would be your COUSIN. I don't think you will find that in the following list and it doesn't seem fair at all to me! I hope you are able to reach 67 without these adaptability points.
http://www.cic.gc.ca/english/information/applications/guides/EG72.asp
Relatives in Canada:
•You or your accompanying spouse or common-law partner has a relative, i.e. parent, grandparent, child, grandchild, child of a parent, (sibling), child of a grandparent, (aunt/uncle), or grandchild of a parent, (niece or nephew), who lives in Canada and is a Canadian citizen or permanent resident.