Wayward Wife and LRT Part 3

[Defacto]

Good morning everybody! I had a great night last night, spending some time with my best friend, enjoying some craft beers, all while his wife watched the kids for a few hours. The kids and I spent the night at their house and a good time was had by all.

So, this is where a coparenting question arises. What responsibility do I have to notify STBX of my plans with kids? Do I have to notify her if someone else watches the kids for a few hours?

STBX called from work last night to check on kids. I told her that I was out for a bit and my best friend's wife was watching the kids. This threw her for a loop. I told STBX that she could call my best friend's wife (her old best friend) if she wanted to talk to the kids.

A few hours later, she sent me these texts:
"I didn't realize the kids were sleeping over at the xxxxx. Can you let me know next time?"
"I'm not upset. I just like knowing where the kids are and who is watching them."

I didn't reply. Then, at 11:30pm, STBX calls. I answer the fourth call. She asks about the kids and me going out, etc. I tell her that the kids and I are all sleeping and that we can talk in the morning.

Then, this morning she called after her shift. I quickly began sharing about the kids. STBX told a short story from work. Then, she asked again about my night out and the sleep over. I told her a two sentence recap and explained how much fun the kids had.

I'm sure STBX will bring it up again. But, I just don't think I need to run every childcare scenario by her.

Thoughts?