Dear Eric >> My son will soon be turning 13, as will my niece. They were born a week apart. I usually host a family pool party for my son’s birthday, but my brother and his wife do not arrange a family party for their daughter. (They also have a nice yard with a pool.).

Instead, they have a party for her and her friends without inviting family. When they show up for my son’s party, family members arrive with gifts for their daughter’s birthday, and I feel like my son has to share his birthday every year with his cousin.

My brother and his wife do not contribute financially nor with prep, serving, cooking or clean-up, so essentially, I am giving their daughter a party as well.

A few years ago, I suggested we combine parties together which they agreed to, but since I had “more people than them,” my mother forbade me from asking them to contribute. I told this to my sister-in-law when she attempted to give me money, and rather than insist she happily put her money back in her wallet.

They make more money than me. I’m a divorced mom on one income. I certainly know this is not my niece’s fault, but how do I communicate to them that I don’t want to share my son’s birthday?

— Feeling Frustrated And Used

Dear Frustrated >> Her intentions may have been good, but your mother’s edict was not helpful. I’m not quite sure why she feels the need to insert herself in this at all. You’re an adult, as is your sister-in-law; it’s none of her business how the costs get split up.

And it makes sense that you share the burden, if this has become a de facto joint party over the years. After more than a decade of doing this, it wouldn’t be surprising to find that your family members all think of this as your son and niece’s party. It is more than OK for you to revisit the conversation with your brother and sister-in-law, acknowledge the reality of what’s going on, and work together on a solution.

And if your mom has thoughts or questions, tell her not to worry about it.

Another thing you might want to consider, is the possibility that this party might be on the verge of changing. Talk to your son about how he wants to celebrate. Maybe he’s really eager for a friends-centric party, too. That might be quite healthy for him, and a lot of fun. If you do change it, though, I’d give a heads up to the family so they can adjust their expectations, and no one accuses you of undercutting your niece.

Send questions to R. Eric Thomas at eric@askingeric.com