Sounds like it's time to drive home the lesson the hard way.

You say they fail to communicate times, dates, plans, etc.

Pick a day they say they won't be coming.

Now, shut off your phone, lock the doors, and go do something fun about half an hour before their normal arrival time.

Come back home when you damn well good and feel like it, and turn your phone back on. Check the voicemails, the increasing panic in their voices with each successive call will be priceless.

Call them back and explain "You never stated you were going to bring the child, what do I look like, 7-11? In case nobody gave you the memo, I have a life outside of providing care for your child"



As for your summer plans, too bad for them. They screwed up and dropped the ball big time. This time, it just so happens it bounced back up and hit them square in the face. Their problem, not yours.

Reply