Hypothetically.
You have a Couple field boarding a couple of horses temporarily, while they build their own barn and get their place together. Your place is a small, adults-only barn but has great facilities. No trainer present, not a busy, or lesson barn, just a quiet place for horses and their owners to enjoy their horses.
The Owners don’t have time to ride so they have a two people to ride the horses for them. You agree to let the two Riders keep the Owners’ horses exercised. The Riders show up rarely.
One day one of the Owners calls to say they will be coming by with a Rider to ride the horses. The day arrives, the Owner shows up, then the Rider shows. The Owner then says that soon there will be 2 children (7 or 8 years old) accompanied by their parents arriving and the Rider will give lessons to the 2 children on one of the Owner’s horses. You explain to the Owner that the barn is an adults-only barn, as advertised. A few minutes later the parents with children arrive ready for their lessons.
What would you do? How would you feel?