Dear Sharon:
Here is how I see it: your first priority by far should not be your boyfriend’s feelings, or his cousin’s mother, or his cousin’s or anyone in his family. Your first priority should be the mental/ emotional health of you and of your child.
If I was you, given what you shared, I would make a decision this very day to not have any contact with his cousin or any of his family members. Or with any person at all who wants you to be in contact with her. Do not go to that family event. Or any future events. Don’t have his family visit you in your home either.
Next consider living separately from your boyfriend, that is, ending the relationship, arrange legally for him to pay child support to you and make a better life for you and your child away from him.
anita