answer:It is understandable how you feel. Some families are more inclusive than others. If I were in that situation, I would let it pass. Once an official part of the family, if the exclusion continued, then it would be worth taking your cousin’s advice about scheduling a girls’ day function. As for mentioning it to the SO, I wouldn’t. My brother’s wife did this, and now the brother attempts to manipulate us to do activities that we don’t want to do just so that she feels included. My sister and I like her. Unfortunately, the constant manipulation drives a wedge in the relationship with both of them.