I had a sticky situation at All star sports once. Due to the extremely thin walls, I heard everything. The wife found out the husband was cheating on her. She was in the room talking on the phone, not loudly, but I could hear talking. And then the husband returned from the pool with the kids. The kids had to be little based on the way they talked, I was guessing like ages 3-5 ish. She asked him about it, he denied it for a long time, and then she showed him his phone (which he left behind), and he couldn't lie anymore. Not sure what was on there, but it must have been all the proof she needed. They fought and yelled for awhile. I heard lots of details about how long it was going on, how he knew her, etc... When I heard something get thrown ( I was thinking it was kicked luggage, or a toy or something), I called the front desk because I was concerned for the kids safety. During all the yelling, the kids were whiny to the point of crying, but not like serious crying yet. (parents, you know what I mean) Eventually, the dad walked out, not sure where he went, the mom calmed down the kids, and then I left my room. I didn't wanna be in the room if/when security came knocking. I lingered in the food court, sat around the pool, and finally went back to change for the race I was running (it was Tower of Terror 10 miler, which used to be at night, and is now defunct). I heard nothing else the rest of my stay, which was one more day. I don't know if security ever came knocking or not, but the person I spoke with on the phone was also concerned. I told her that I know it's none of my business, but I was worried for the kids in that room, and she agreed that safety comes first.
I still think about those kids and hope they were/are safe.