Small dot of light, looked like a satellite, moving in straight line. Then, sudden change of direction, significant change of speed.

Around 9:20 pm in Tulum, Mexico, my wife and I were in chairs on the beach, looking at the sky. Cloudless night.
An object caught both of our attention. I said something like “look, a satellite.” It was a small dot of light, like a star, moving steadily across the sky at a slow pace, in a perfectly straight line. Consistent pace. Then, suddenly, it stopped completely still for less than a second. Then, it dramatically changed direction and also changed speed. It went sort of perpendicular to its original direction for a couple of seconds, at a much faster pace than its original speed. Then it completely disappeared from view, very suddenly.
My wife and I both saw these exact same details. Neither of us could explain what we had just seen. It was unlike anything we had ever observed before. The entire event took about 10 seconds. We didn’t have our phones so we don’t know exactly what time it occurred. About 10-15 minutes later we found a clock, so we estimate the sighting around 9:20 pm.
We noted where in the sky we saw this. We used an app to understand what star it occurred near. Near the constellation “bootes” and specifically near the star “izar.”
The object was too far away to see any details. It looked just like a tiny moving dot of light, or like a star that was moving. No flashing light, no pulsing, no beams of light. No trail behind it. No sounds. Just a steady pinprick of light.