Anonymous wrote:You invite, you should pay or stop inviting.
This is just not how it works with teenagers. In fact, OP is doing it wrong.
The two girls should make plans on their own and bring their own money. No one needs to involve moms except to ask for a ride. Most young teens do boring things that are low cost- like go to the mall a zillion times, football games, hang out at shopping centers, hang out at friends, go to school sponsored events.
Maybe OP’s kid can do more expensive things with different friends.