How to get my 9 year old in theLounge?

My wife and I both have own priority passes through credit cards. She has Venture x business which allows 2 guest but I ly till Feb 2026. After that it will be just herself. I have priority pass through Us Bank card but no guest allowed. When we travel as a family, how can I get my 9 year old in without paying for her separately? Can I buy a priority pass for her self?