Wait a minute, I cannot find awarding point under adaptability (OP6) for brother's wife (or any siblings for that matter):
12.16. Adaptability
Pursuant to R83, the officer will assess the application and award a maximum of 10 adaptability
points, as follows:
...
d) Relatives in Canada:
Award five points if the applicant or accompanying spouse or common- law partner has a relative (parent, grandparent, child, grandchild, child of a parent, child of a grandparent, or grandchild of a parent) who is residing in Canada and is a Canadian citizen or permanent resident.