DH, DD and I often head down the country for the day for a certain type of sporting event. Now DF's DD keeps pushing to come and she is very insistent saying how much she loves the type of event we go to. She has been asking non-stop if she can come next year. She is 20 years old.
Basically I don't know how to refuse and am wondering if AIBU. I love my family time and would prefer not to take her or anyone else for that matter.