Ya know how it is when you(general) have a plan, you're working the plan, things are just moving right along very smoothly.......kind of like sitting in a canoe and paddling down a slow moving, pretty river.
Then some interloper rushes in 'to help' by trying to affix an outboard motor to the back of the canoe.

OldestDD and her DH have 2 school-age children. DSIL's mother and I keep the grandkids every other week. Deb and I have been doing this for 3(?) years. We enjoy the week with the kids and the next week of no-kids. It's has worked out well for everyone!
DSIL came home on Sunday, and telling DSIL that his Dad said that Deb was not going to be keeping the kids anymore.
DD was very upset, she left a message on her in-laws answering machine giving her point of view, she called me to tell me about it.
When Deb listened to the messages, she got upset, and called DD saying she never said anything about not keeping the kids.
My take on it is that DD's in-laws are a devoted couple. Deb had a health problem that we are all aware of and watch to make sure she is okay. Deb's DH was concerned for her health and misunderstood our schedule-he thought she had the kids all day/everyday.
Anyway, DD talked with everyone and we're all good and are on the same page.
I called DD this morning and told her I guess her father-in-law was trying to put a motor on our canoe!